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Add lock debugging helper code

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This commit is contained in:
Theodore Dubois 2019-01-22 11:46:11 -08:00
parent 006cb7c665
commit 90825eaf02
1 changed files with 29 additions and 2 deletions
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31
util/sync.h
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@ -8,15 +8,42 @@
// locks, implemented using pthread
#define LOCK_DEBUG 0
typedef struct {
pthread_mutex_t m;
pthread_t owner;
#if LOCK_DEBUG
const char *file;
int line;
int pid;
#endif
} lock_t;
#define lock_init(lock) pthread_mutex_init(&(lock)->m, NULL)
#define LOCK_INITIALIZER {PTHREAD_MUTEX_INITIALIZER, 0, 0, 0}
#define lock(lock) do { pthread_mutex_lock(&(lock)->m); (lock)->owner = pthread_self(); (lock)->line = __LINE__; (lock)->file = __FILE__; } while (0)
#if LOCK_DEBUG
#define LOCK_INITIALIZER {PTHREAD_MUTEX_INITIALIZER, 0, 0, 0, 0}
#else
#define LOCK_INITIALIZER {PTHREAD_MUTEX_INITIALIZER, 0}
#endif
static inline void __lock(lock_t *lock, __attribute__((unused)) const char *file, __attribute__((unused)) int line) {
pthread_mutex_lock(&lock->m);
lock->owner = pthread_self();
#if LOCK_DEBUG
lock->file = file;
lock->line = line;
extern int current_pid(void);
lock->pid = current_pid();
#endif
}
#define lock(lock) __lock(lock, __FILE__, __LINE__)
static inline void unlock(lock_t *lock) {
pthread_mutex_unlock(&lock->m);
#if LOCK_DEBUG
lock->file = NULL;
lock->line = 0;
lock->pid = 0;
#endif
}
#define unlock(lock) pthread_mutex_unlock(&(lock)->m)
// conditions, implemented using pthread conditions but hacked so you can also