mirror of https://github.com/schoebel/mars
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
|
// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
|
||
|
|
#ifndef BRICK_ATOMIC_H
|
||
|
|
#define BRICK_ATOMIC_H
|
||
|
|
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
#include <asm/atomic.h>
|
||
|
|
|
||
|
|
#include "brick_checking.h"
|
||
|
|
|
||
|
|
#define ATOMIC_DEBUGGING
|
||
|
|
|
||
|
|
#ifndef CONFIG_MARS_DEBUG
|
||
|
|
#undef ATOMIC_DEBUGGING
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define ATOMIC_MAXTRACE 64
|
||
|
|
|
||
|
|
/* Trivial wrapper to force type checking.
|
||
|
|
*/
|
||
|
|
typedef struct tatomic {
|
||
|
|
atomic_t ta_atomic;
|
||
|
|
} tatomic_t;
|
||
|
|
|
||
|
|
typedef struct atomic_trace {
|
||
|
|
#ifdef ATOMIC_DEBUGGING
|
||
|
|
atomic_t at_count;
|
||
|
|
short at_lines[ATOMIC_MAXTRACE];
|
||
|
|
#endif
|
||
|
|
} atomic_trace_t;
|
||
|
|
|
||
|
|
#ifdef ATOMIC_DEBUGGING
|
||
|
|
|
||
|
|
#define tatomic_trace(_at, _cmd) \
|
||
|
|
({ \
|
||
|
|
int _index = atomic_add_return(1, &(_at)->at_count) - 1; \
|
||
|
|
if (_index >= 0 && _index < ATOMIC_MAXTRACE) { \
|
||
|
|
(_at)->at_lines[_index] = __LINE__; \
|
||
|
|
} \
|
||
|
|
_cmd; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define tatomic_out(_at,_MSG) \
|
||
|
|
({ \
|
||
|
|
int __i; \
|
||
|
|
int __max = atomic_read(&(_at)->at_count); \
|
||
|
|
_MSG("at_count = %d\n", __max); \
|
||
|
|
if (__max > ATOMIC_MAXTRACE) \
|
||
|
|
__max = ATOMIC_MAXTRACE; \
|
||
|
|
for (__i = 0; __i < __max; __i++) { \
|
||
|
|
_MSG("%2d %4d\n", __i, (_at)->at_lines[__i]); \
|
||
|
|
} \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define _CHECK_TATOMIC(_at,_atom,OP,_minval) \
|
||
|
|
do { \
|
||
|
|
if (BRICK_CHECKING) { \
|
||
|
|
int __test = atomic_read(&(_atom)->ta_atomic); \
|
||
|
|
if (__test OP (_minval)) { \
|
||
|
|
atomic_set(&(_atom)->ta_atomic, _minval); \
|
||
|
|
BRICK_ERR("%d: tatomic " #_atom " " #OP " " #_minval " (%d)\n", __LINE__, __test); \
|
||
|
|
tatomic_out(_at, BRICK_DMP); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define tatomic_trace(_at,_cmd) _cmd
|
||
|
|
|
||
|
|
#define _CHECK_TATOMIC(_at,_atom,OP,_minval) \
|
||
|
|
_CHECK_ATOMIC(&(_atom)->ta_atomic, OP, _minval)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define CHECK_TATOMIC(_at,_atom,_minval) \
|
||
|
|
_CHECK_TATOMIC(_at, _atom, <, _minval)
|
||
|
|
|
||
|
|
#define tatomic_inc(at,a) tatomic_trace(at, atomic_inc(&(a)->ta_atomic))
|
||
|
|
#define tatomic_dec(at,a) tatomic_trace(at, atomic_dec(&(a)->ta_atomic))
|
||
|
|
#define tatomic_dec_and_test(at,a) tatomic_trace(at, atomic_dec_and_test(&(a)->ta_atomic))
|
||
|
|
|
||
|
|
#endif
|