mirror of https://github.com/schoebel/mars
655 lines
21 KiB
C
655 lines
21 KiB
C
// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
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#ifndef BRICK_H
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#define BRICK_H
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#ifdef _STRATEGY
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#define _STRATEGY_CODE(X) X
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#define _NORMAL_CODE(X) /**/
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#else
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#define _STRATEGY_CODE(X) /**/
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#define _NORMAL_CODE(X) X
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#endif
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#define BRICK_ERROR "BRICK_ERROR " __BASE_FILE__ ": "
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#define BRICK_INFO "BRICK_INFO " __BASE_FILE__ ": "
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#define BRICK_DEBUG "BRICK_DEBUG " __BASE_FILE__ ": "
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#define BRICK_ERR(fmt, args...) printk(BRICK_ERROR "%s(): " fmt, __FUNCTION__, ##args)
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#define BRICK_INF(fmt, args...) printk(BRICK_INFO "%s(): " fmt, __FUNCTION__, ##args)
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#ifdef BRICK_DEBUGGING
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#define BRICK_DBG(fmt, args...) printk(BRICK_DEBUG "%s(): " fmt, __FUNCTION__, ##args)
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#else
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#define BRICK_DBG(args...) /**/
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#endif
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#define MAX_BRICK_TYPES 64
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/////////////////////////////////////////////////////////////////////////
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// definitions for generic objects with aspects
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#define MAX_DEFAULT_ASPECTS 8
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struct generic_aspect;
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#define GENERIC_ASPECT_TYPE(TYPE) \
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char *aspect_type_name; \
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const struct generic_object_type *object_type; \
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int aspect_size; \
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int (*init_fn)(struct generic_aspect *ini, void *data); \
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void (*exit_fn)(struct generic_aspect *ini, void *data); \
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struct generic_aspect_type {
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GENERIC_ASPECT_TYPE(generic);
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};
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#define GENERIC_ASPECT_LAYOUT(TYPE) \
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const struct generic_aspect_type *aspect_type; \
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void *init_data; \
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int aspect_offset; \
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struct generic_aspect_layout {
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GENERIC_ASPECT_LAYOUT(generic);
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};
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#define GENERIC_OBJECT_TYPE(TYPE) \
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char *object_type_name; \
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int default_size; \
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int brick_obj_nr; \
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int (*init_fn)(struct generic_aspect *ini, void *data); \
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void (*exit_fn)(struct generic_aspect *ini, void *data); \
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struct generic_object_type {
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GENERIC_OBJECT_TYPE(generic);
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};
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#define GENERIC_OBJECT_LAYOUT(TYPE) \
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struct generic_aspect_layout **aspect_layouts; \
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const struct generic_object_type *object_type; \
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void *init_data; \
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int aspect_count; \
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int aspect_max; \
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int object_size; \
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int last_count; \
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int last_jiffies; \
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atomic_t alloc_count; \
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atomic_t free_count; \
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spinlock_t free_lock; \
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struct generic_object *free_list; \
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char *module_name; \
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struct generic_object_layout {
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GENERIC_OBJECT_LAYOUT(generic);
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};
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#define GENERIC_OBJECT(TYPE) \
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struct TYPE##_object_layout *object_layout; \
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int object_size; \
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struct generic_object {
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GENERIC_OBJECT(generic);
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};
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#define GENERIC_ASPECT(TYPE) \
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struct TYPE##_object *object; \
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struct generic_aspect {
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GENERIC_ASPECT(generic);
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};
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#define GENERIC_CALLBACK(TYPE) \
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void (*cb_fn)(struct TYPE##_callback *cb); \
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void *cb_private; \
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int cb_error; \
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struct generic_callback *cb_prev; \
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struct generic_callback {
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GENERIC_CALLBACK(generic);
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};
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/////////////////////////////////////////////////////////////////////////
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// definitions for generic bricks
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struct generic_input;
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struct generic_output;
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struct generic_brick_ops;
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struct generic_output_ops;
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struct generic_brick_type;
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#define GENERIC_BRICK(BRICK) \
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char *brick_name; \
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const struct BRICK##_brick_type *type; \
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struct BRICK##_brick_ops *ops; \
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int nr_inputs; \
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int nr_outputs; \
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struct BRICK##_input **inputs; \
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struct BRICK##_output **outputs; \
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struct list_head tmp_head; \
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struct generic_brick {
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GENERIC_BRICK(generic);
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};
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#define GENERIC_INPUT(BRICK) \
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char *input_name; \
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struct BRICK##_brick *brick; \
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const struct BRICK##_input_type *type; \
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struct BRICK##_output *connect; \
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struct list_head input_head; \
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struct generic_input {
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GENERIC_INPUT(generic);
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};
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#define GENERIC_OUTPUT(BRICK) \
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char *output_name; \
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struct BRICK##_brick *brick; \
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const struct BRICK##_output_type *type; \
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struct BRICK##_output_ops *ops; \
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struct list_head output_head; \
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int nr_connected; \
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/* _must_ be the last member */ \
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struct generic_aspect_layout aspect_layouts[BRICK_OBJ_NR]; \
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struct generic_output {
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GENERIC_OUTPUT(generic);
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};
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#define GENERIC_OUTPUT_CALL(OUTPUT,OP,ARGS...) \
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( \
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(void)LOCK_CHECK(OP), \
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(OUTPUT) && (OUTPUT)->ops->OP ? \
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(OUTPUT)->ops->OP(OUTPUT, ##ARGS) : \
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-ENOSYS \
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)
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#define GENERIC_INPUT_CALL(INPUT,OP,ARGS...) \
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( \
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(void)LOCK_CHECK(OP), \
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(INPUT) && (INPUT)->connect ? \
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GENERIC_OUTPUT_CALL((INPUT)->connect, OP, ##ARGS) : \
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-ECONNREFUSED \
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)
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#define GENERIC_BRICK_OPS(BRICK) \
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int (*brick_switch)(struct BRICK##_brick *brick, bool state); \
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struct generic_brick_ops {
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GENERIC_BRICK_OPS(generic);
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};
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#define GENERIC_OUTPUT_OPS(BRICK) \
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/*int (*output_start)(struct BRICK##_output *output);*/ \
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/*int (*output_stop)(struct BRICK##_output *output);*/ \
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int (*make_object_layout)(struct BRICK##_output *output, struct generic_object_layout *object_layout); \
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struct generic_output_ops {
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GENERIC_OUTPUT_OPS(generic)
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};
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// although possible, *_type should never be extended
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#define GENERIC_BRICK_TYPE(BRICK) \
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char *type_name; \
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int brick_size; \
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int max_inputs; \
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int max_outputs; \
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const struct BRICK##_input_type **default_input_types; \
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char **default_input_names; \
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const struct BRICK##_output_type **default_output_types; \
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char **default_output_names; \
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struct BRICK##_brick_ops *master_ops; \
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const struct BRICK##_input_types **default_type; \
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int (*brick_construct)(struct BRICK##_brick *brick); \
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int (*brick_destruct)(struct BRICK##_brick *brick); \
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struct generic_brick_type {
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GENERIC_BRICK_TYPE(generic);
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};
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#define GENERIC_INPUT_TYPE(BRICK) \
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char *type_name; \
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int input_size; \
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int (*input_construct)(struct BRICK##_input *input); \
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int (*input_destruct)(struct BRICK##_input *input); \
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struct generic_input_type {
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GENERIC_INPUT_TYPE(generic);
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};
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#define GENERIC_OUTPUT_TYPE(BRICK) \
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char *type_name; \
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int output_size; \
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struct BRICK##_output_ops *master_ops; \
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int (*output_construct)(struct BRICK##_output *output); \
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int (*output_destruct)(struct BRICK##_output *output); \
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const struct generic_aspect_type **aspect_types; \
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const int layout_code[BRICK_OBJ_NR]; \
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struct generic_output_type {
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GENERIC_OUTPUT_TYPE(generic);
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};
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#define LAYOUT_NONE 0
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#define LAYOUT_ALL -1
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#define LAYOUT_1(X1) ((X1) | 255 << 8)
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#define LAYOUT_2(X1,X2) ((X1) | (X2) << 8 | 255 << 16)
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#define LAYOUT_3(X1,X2,X3) ((X1) | (X2) << 8 | (X3) << 16 | 255 << 24)
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int generic_register_brick_type(const struct generic_brick_type *new_type);
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int generic_unregister_brick_type(const struct generic_brick_type *old_type);
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extern inline void _generic_output_init(struct generic_brick *brick, const struct generic_output_type *type, struct generic_output *output, char *output_name)
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{
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output->output_name = output_name;
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output->brick = brick;
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output->type = type;
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output->ops = type->master_ops;
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output->nr_connected = 0;
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}
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#ifdef _STRATEGY // call this only in strategy bricks, never in ordinary bricks
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// you need this only if you circumvent generic_brick_init_full()
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extern inline int generic_brick_init(const struct generic_brick_type *type, struct generic_brick *brick, char *brick_name)
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{
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brick->brick_name = brick_name;
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brick->type = type;
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brick->ops = type->master_ops;
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brick->nr_inputs = 0;
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brick->nr_outputs = 0;
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brick->tmp_head.next = brick->tmp_head.prev = &brick->tmp_head;
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return 0;
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}
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extern inline int generic_input_init(struct generic_brick *brick, int index, const struct generic_input_type *type, struct generic_input *input, char *input_name)
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{
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if (index < 0 || index >= brick->type->max_inputs)
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return -ENOMEM;
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if (brick->inputs[index])
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return -EEXIST;
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input->input_name = input_name;
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input->brick = brick;
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input->type = type;
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input->connect = NULL;
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brick->inputs[index] = input;
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brick->nr_inputs++;
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return 0;
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}
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extern inline int generic_output_init(struct generic_brick *brick, int index, const struct generic_output_type *type, struct generic_output *output, char *output_name)
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{
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if (index < 0 || index >= brick->type->max_outputs)
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return -ENOMEM;
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if (brick->outputs[index])
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return -EEXIST;
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_generic_output_init(brick, type, output, output_name);
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brick->outputs[index] = output;
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brick->nr_outputs++;
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return 0;
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}
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extern inline int generic_size(const struct generic_brick_type *brick_type)
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{
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int size = brick_type->brick_size;
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int i;
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size += brick_type->max_inputs * sizeof(void*);
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for (i = 0; i < brick_type->max_inputs; i++) {
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size += brick_type->default_input_types[i]->input_size;
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}
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size += brick_type->max_outputs * sizeof(void*);
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for (i = 0; i < brick_type->max_outputs; i++) {
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size += brick_type->default_output_types[i]->output_size;
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}
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return size;
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}
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/* If possible, use this instead of generic_*_init().
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* input_types and output_types may be NULL => use default_*_types
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*/
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int generic_brick_init_full(
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void *data,
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int size,
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const struct generic_brick_type *brick_type,
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const struct generic_input_type **input_types,
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const struct generic_output_type **output_types,
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char **names);
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int generic_brick_exit_full(
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struct generic_brick *brick);
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extern inline int generic_connect(struct generic_input *input, struct generic_output *output)
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{
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BRICK_DBG("generic_connect(input=%p, output=%p)\n", input, output);
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if (!input || !output)
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return -EINVAL;
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if (input->connect)
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return -EEXIST;
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input->connect = output;
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output->nr_connected++; //TODO: protect against races, e.g. atomic_t
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BRICK_DBG("now nr_connected=%d\n", output->nr_connected);
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return 0;
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}
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extern inline int generic_disconnect(struct generic_input *input)
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{
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BRICK_DBG("generic_disconnect(input=%p)\n", input);
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if (!input)
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return -EINVAL;
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if (input->connect) {
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input->connect->nr_connected--; //TODO: protect against races, e.g. atomic_t
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BRICK_DBG("now nr_connected=%d\n", input->connect->nr_connected);
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input->connect = NULL;
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}
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return 0;
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}
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#endif // _STRATEGY
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// simple wrappers for type safety
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#define GENERIC_MAKE_FUNCTIONS(BRICK) \
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extern inline int BRICK##_register_brick_type(void) \
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{ \
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extern const struct BRICK##_brick_type BRICK##_brick_type; \
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extern int BRICK##_brick_nr; \
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if (BRICK##_brick_nr >= 0) { \
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BRICK_ERR("brick type " #BRICK " is already registered.\n"); \
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return -EEXIST; \
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} \
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BRICK##_brick_nr = generic_register_brick_type((const struct generic_brick_type*)&BRICK##_brick_type); \
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return BRICK##_brick_nr < 0 ? BRICK##_brick_nr : 0; \
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} \
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\
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extern inline int BRICK##_unregister_brick_type(void) \
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{ \
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extern const struct BRICK##_brick_type BRICK##_brick_type; \
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return generic_unregister_brick_type((const struct generic_brick_type*)&BRICK##_brick_type); \
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} \
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\
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extern int BRICK##_make_object_layout(struct BRICK##_output *output, struct generic_object_layout *object_layout) \
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{ \
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return default_make_object_layout((struct generic_output*)output, object_layout); \
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} \
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\
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extern const struct BRICK##_brick_type BRICK##_brick_type; \
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extern const struct BRICK##_input_type BRICK##_input_type; \
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extern const struct BRICK##_output_type BRICK##_output_type; \
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\
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static inline void _##BRICK##_output_init(struct BRICK##_brick *brick, struct BRICK##_output *output, char *output_name) \
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{ \
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_generic_output_init( \
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(struct generic_brick*)brick, \
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(const struct generic_output_type*)&BRICK##_output_type, \
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(struct generic_output*)output, \
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output_name); \
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} \
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\
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_STRATEGY_CODE( \
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static inline int BRICK##_brick_init(struct BRICK##_brick *brick, char *brick_name) \
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{ \
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return generic_brick_init((const struct generic_brick_type*)&BRICK##_brick_type, (struct generic_brick*)brick, brick_name); \
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} \
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\
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static inline int BRICK##_input_init(struct BRICK##_brick *brick, int index, struct BRICK##_input *input, char *input_name) \
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{ \
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return generic_input_init( \
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(struct generic_brick*)brick, \
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index, \
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(struct generic_input_type*)&BRICK##_input_type, \
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(struct generic_input*)input, \
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input_name); \
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} \
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\
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static inline int BRICK##_output_init(struct BRICK##_brick *brick, int index, struct BRICK##_output *output, char *output_name) \
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{ \
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return generic_output_init( \
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(struct generic_brick*)brick, \
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index, \
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(const struct generic_output_type*)&BRICK##_output_type, \
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(struct generic_output*)output, \
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output_name); \
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} \
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\
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)
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/* Define a pair of connectable subtypes.
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* For type safety, use this for all possible combinations.
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* Yes, this may become quadratic in large type systems, but
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* (a) thou shalt not define many types,
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* (b) these macros generate only definitions, but no additional
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* code at runtime.
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*/
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#define GENERIC_MAKE_CONNECT(INPUT_BRICK,OUTPUT_BRICK) \
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\
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_STRATEGY_CODE( \
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\
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extern inline int INPUT_BRICK##_##OUTPUT_BRICK##_connect( \
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struct INPUT_BRICK##_input *input, \
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struct OUTPUT_BRICK##_output *output) \
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{ \
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return generic_connect((struct generic_input*)input, (struct generic_output*)output); \
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} \
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\
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extern inline int INPUT_BRICK##_##OUTPUT_BRICK####_disconnect( \
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struct INPUT_BRICK##_input *input) \
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{ \
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return generic_disconnect((struct generic_input*)input); \
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} \
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)
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///////////////////////////////////////////////////////////////////////
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// default operations on objects / aspects
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extern int default_make_object_layout(struct generic_output *output, struct generic_object_layout *object_layout);
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extern int generic_add_aspect(struct generic_output *output, struct generic_object_layout *object_layout, const struct generic_aspect_type *aspect_type);
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extern int default_init_object_layout(struct generic_output *output, struct generic_object_layout *object_layout, int aspect_max, const struct generic_object_type *object_type, char *module_name);
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extern struct generic_object *alloc_generic(struct generic_object_layout *object_layout);
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extern void free_generic(struct generic_object *object);
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#define GENERIC_OBJECT_LAYOUT_FUNCTIONS(BRICK) \
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\
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extern inline int BRICK##_init_object_layout(struct BRICK##_output *output, struct generic_object_layout *object_layout, int aspect_max, const struct generic_object_type *object_type) \
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{ \
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if (likely(object_layout->object_type)) \
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return 0; \
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return default_init_object_layout((struct generic_output*)output, object_layout, aspect_max, object_type, #BRICK); \
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} \
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#define GENERIC_ASPECT_LAYOUT_FUNCTIONS(BRICK,TYPE) \
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\
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extern inline int BRICK##_##TYPE##_add_aspect(struct BRICK##_output *output, struct TYPE##_object_layout *object_layout, const struct generic_aspect_type *aspect_type) \
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{ \
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int res = generic_add_aspect((struct generic_output*)output, (struct generic_object_layout *)object_layout, aspect_type); \
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BRICK_DBG(#BRICK " " #TYPE "added aspect_type %p (%s) to object_layout %p (type %s) on output %p (type %s), status=%d\n", aspect_type, aspect_type->aspect_type_name, object_layout, object_layout->object_type->object_type_name, output, output->type->type_name, res); \
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return res; \
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} \
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#define GENERIC_OBJECT_FUNCTIONS(TYPE) \
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\
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extern inline struct TYPE##_object *TYPE##_construct(void *data, struct TYPE##_object_layout *object_layout) \
|
|
{ \
|
|
struct TYPE##_object *obj = data; \
|
|
int i; \
|
|
\
|
|
obj->object_layout = object_layout; \
|
|
if (object_layout->object_type->init_fn) { \
|
|
int status = object_layout->object_type->init_fn((void*)obj, object_layout->init_data); \
|
|
if (status < 0) { \
|
|
return NULL; \
|
|
} \
|
|
} \
|
|
for (i = 0; i < object_layout->aspect_count; i++) { \
|
|
struct generic_aspect_layout *aspect_layout; \
|
|
struct generic_aspect *aspect; \
|
|
aspect_layout = object_layout->aspect_layouts[i]; \
|
|
if (!aspect_layout->aspect_type) \
|
|
continue; \
|
|
aspect = data + aspect_layout->aspect_offset; \
|
|
aspect->object = (void*)obj; \
|
|
if (aspect_layout->aspect_type->init_fn) { \
|
|
int status = aspect_layout->aspect_type->init_fn((void*)aspect, aspect_layout->init_data); \
|
|
if (status < 0) { \
|
|
return NULL; \
|
|
} \
|
|
} \
|
|
} \
|
|
return obj; \
|
|
} \
|
|
\
|
|
extern inline void TYPE##_destruct(struct TYPE##_object *obj) \
|
|
{ \
|
|
struct TYPE##_object_layout *object_layout = obj->object_layout; \
|
|
int i; \
|
|
\
|
|
if (unlikely(!object_layout || !object_layout->object_type)) { \
|
|
BRICK_ERR("object %p/%p is corrupted\n", obj, object_layout); \
|
|
dump_stack(); \
|
|
return; \
|
|
} \
|
|
if (object_layout->object_type->exit_fn) { \
|
|
object_layout->object_type->exit_fn((void*)obj, object_layout->init_data); \
|
|
} \
|
|
for (i = 0; i < object_layout->aspect_count; i++) { \
|
|
struct generic_aspect_layout *aspect_layout; \
|
|
struct generic_aspect *aspect; \
|
|
aspect_layout = object_layout->aspect_layouts[i]; \
|
|
if (!aspect_layout->aspect_type) \
|
|
continue; \
|
|
aspect = ((void*)obj) + aspect_layout->aspect_offset; \
|
|
if (aspect_layout->aspect_type->exit_fn) { \
|
|
aspect_layout->aspect_type->exit_fn((void*)aspect, aspect_layout->init_data); \
|
|
} \
|
|
} \
|
|
} \
|
|
|
|
#define GENERIC_ASPECT_FUNCTIONS(BRICK,TYPE) \
|
|
\
|
|
extern inline struct BRICK##_##TYPE##_aspect *BRICK##_##TYPE##_get_aspect(struct BRICK##_output *output, struct TYPE##_object *obj) \
|
|
{ \
|
|
struct generic_object_layout *object_layout; \
|
|
struct generic_aspect_layout *aspect_layout; \
|
|
int nr; \
|
|
\
|
|
object_layout = (struct generic_object_layout*)obj->object_layout; \
|
|
nr = object_layout->object_type->brick_obj_nr; \
|
|
aspect_layout = &output->aspect_layouts[nr]; \
|
|
if (unlikely(!aspect_layout->aspect_type)) { \
|
|
BRICK_ERR("brick "#BRICK": bad aspect slot on " #TYPE " pointer %p\n", obj); \
|
|
return NULL; \
|
|
} \
|
|
return (void*)obj + aspect_layout->aspect_offset; \
|
|
} \
|
|
\
|
|
extern inline int BRICK##_##TYPE##_init_object_layout(struct BRICK##_output *output, struct generic_object_layout *object_layout) \
|
|
{ \
|
|
return BRICK##_init_object_layout(output, object_layout, 32, &TYPE##_type); \
|
|
} \
|
|
\
|
|
extern inline struct TYPE##_object *BRICK##_alloc_##TYPE(struct BRICK##_output *output, struct generic_object_layout *object_layout) \
|
|
{ \
|
|
int status = BRICK##_##TYPE##_init_object_layout(output, object_layout); \
|
|
if (status < 0) \
|
|
return NULL; \
|
|
return (struct TYPE##_object*)alloc_generic(object_layout); \
|
|
} \
|
|
\
|
|
extern inline struct TYPE##_object *BRICK##_alloc_##TYPE##_pure(struct generic_object_layout *object_layout) \
|
|
{ \
|
|
return (struct TYPE##_object*)alloc_generic(object_layout); \
|
|
} \
|
|
\
|
|
extern inline void BRICK##_free_##TYPE(struct TYPE##_object *object) \
|
|
{ \
|
|
free_generic((struct generic_object*)object); \
|
|
} \
|
|
|
|
|
|
GENERIC_OBJECT_LAYOUT_FUNCTIONS(generic);
|
|
GENERIC_OBJECT_FUNCTIONS(generic);
|
|
|
|
///////////////////////////////////////////////////////////////////////
|
|
|
|
// some helpers
|
|
|
|
#ifdef CONFIG_DEBUG_SPINLOCK
|
|
|
|
# define LOCK_CHECK(OP) \
|
|
({ \
|
|
if (atomic_read(¤t->lock_count)) { \
|
|
BRICK_ERR("never call " #OP "() with a spinlock held.\n"); \
|
|
} \
|
|
})
|
|
|
|
# define traced_lock(spinlock,flags) \
|
|
do { \
|
|
if (atomic_read(¤t->lock_count)) { \
|
|
BRICK_ERR("please do not nest spinlocks at line %d, reorganize your code.\n", __LINE__); \
|
|
} \
|
|
atomic_inc(¤t->lock_count); \
|
|
(void)flags; \
|
|
/*spin_lock(spinlock);*/ \
|
|
spin_lock_irqsave(spinlock, flags); \
|
|
} while (0)
|
|
|
|
# define traced_unlock(spinlock,flags) \
|
|
do { \
|
|
/*spin_unlock(spinlock);*/ \
|
|
spin_unlock_irqrestore(spinlock, flags); \
|
|
atomic_dec(¤t->lock_count); \
|
|
} while (0)
|
|
|
|
# define traced_readlock(spinlock,flags) \
|
|
do { \
|
|
if (atomic_read(¤t->lock_count)) { \
|
|
BRICK_ERR("please do not nest spinlocks at line %d, reorganize your code.\n", __LINE__); \
|
|
} \
|
|
atomic_inc(¤t->lock_count); \
|
|
(void)flags; \
|
|
read_lock(spinlock); \
|
|
} while (0)
|
|
|
|
# define traced_readunlock(spinlock,flags) \
|
|
do { \
|
|
/*spin_unlock_irqrestore(spinlock,flags);*/ \
|
|
read_unlock(spinlock); \
|
|
atomic_dec(¤t->lock_count); \
|
|
} while (0)
|
|
|
|
# define traced_writelock(spinlock,flags) \
|
|
do { \
|
|
if (atomic_read(¤t->lock_count)) { \
|
|
BRICK_ERR("please do not nest spinlocks at line %d, reorganize your code.\n", __LINE__); \
|
|
} \
|
|
atomic_inc(¤t->lock_count); \
|
|
(void)flags; \
|
|
read_lock(spinlock); \
|
|
} while (0)
|
|
|
|
# define traced_writeunlock(spinlock,flags) \
|
|
do { \
|
|
/*spin_unlock_irqrestore(spinlock,flags);*/ \
|
|
read_unlock(spinlock); \
|
|
atomic_dec(¤t->lock_count); \
|
|
} while (0)
|
|
|
|
#else
|
|
|
|
# define LOCK_CHECK(OP) 0
|
|
# define traced_lock(spinlock,flags) spin_lock_irqsave(spinlock,flags)
|
|
# define traced_unlock(spinlock,flags) spin_unlock_irqrestore(spinlock,flags)
|
|
# define traced_readlock(spinlock,flags) read_lock_irqsave(spinlock,flags)
|
|
# define traced_readunlock(spinlock,flags) read_unlock_irqrestore(spinlock,flags)
|
|
# define traced_writelock(spinlock,flags) write_lock_irqsave(spinlock,flags)
|
|
# define traced_writeunlock(spinlock,flags) write_unlock_irqrestore(spinlock,flags)
|
|
|
|
#endif
|
|
#endif
|