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infra: improve callback debugging

This commit is contained in:
Thomas Schoebel-Theuer 2014-03-23 10:48:46 +01:00
parent c45f2da80c
commit 9ab367f11a
1 changed files with 42 additions and 5 deletions
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47
kernel/brick.h
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@ -145,17 +145,28 @@ struct callback_object {
/* Initial setup of the callback chain
*/
#define SETUP_CALLBACK(obj,fn,priv) \
#define _SETUP_CALLBACK(obj,fn,priv) \
(obj)->_object_cb.cb_fn = (fn); \
(obj)->_object_cb.cb_private = (priv); \
(obj)->_object_cb.cb_error = 0; \
(obj)->_object_cb.cb_next = NULL; \
(obj)->object_cb = &(obj)->_object_cb; \
#ifdef BRICK_DEBUGGING
#define SETUP_CALLBACK(obj,fn,priv) \
if (unlikely((obj)->_object_cb.cb_fn)) { \
BRICK_ERR("callback function %p is already installed (new=%p)\n", \
(obj)->_object_cb.cb_fn, (fn)); \
} \
_SETUP_CALLBACK(obj,fn,priv)
#else
#define SETUP_CALLBACK(obj,fn,priv) _SETUP_CALLBACK(obj,fn,priv)
#endif
/* Insert a new member into the callback chain
*/
#define INSERT_CALLBACK(obj,new,fn,priv) \
if (!(new)->cb_fn) { \
#define _INSERT_CALLBACK(obj,new,fn,priv) \
if (likely(!(new)->cb_fn)) { \
(new)->cb_fn = (fn); \
(new)->cb_private = (priv); \
(new)->cb_error = 0; \
@ -163,15 +174,30 @@ struct callback_object {
(obj)->object_cb = (new); \
}
#ifdef BRICK_DEBUGGING
#define INSERT_CALLBACK(obj,new,fn,priv) \
if (unlikely(!(obj)->_object_cb.cb_fn)) { \
BRICK_ERR("initical callback function is missing\n"); \
} \
_INSERT_CALLBACK(obj,new,fn,priv) \
else { BRICK_ERR("new object %p is not pristine\n", (new)->cb_fn); }
#else
#define INSERT_CALLBACK(obj,new,fn,priv) _INSERT_CALLBACK(obj,new,fn,priv)
#endif
/* Call the first callback in the chain.
*/
#define SIMPLE_CALLBACK(obj,err) \
if (obj) { \
if (likely(obj)) { \
struct generic_callback *__cb = (obj)->object_cb; \
if (__cb) { \
if (likely(__cb)) { \
__cb->cb_error = (err); \
__cb->cb_fn(__cb); \
} else { \
BRICK_ERR("callback object_cb pointer is NULL\n"); \
} \
} else { \
BRICK_ERR("callback obj pointer is NULL\n"); \
}
#define CHECKED_CALLBACK(obj,err,done) \
@ -195,6 +221,17 @@ struct callback_object {
__next_cb->cb_fn(__next_cb); \
}
/* The last callback handler in the chain should call this
* for checking whether the end of the chain has been reached
*/
#define LAST_CALLBACK(cb) \
{ \
struct generic_callback *__next_cb = (cb)->cb_next; \
if (unlikely(__next_cb)) { \
BRICK_ERR("end of callback chain %p has not been reached, rest = %p\n", (cb), __next_cb); \
} \
}
/* Query the callback status.
* This uses always the first member of the chain!
*/