132 lines
4.4 KiB
C
132 lines
4.4 KiB
C
#include <stasis/common.h>
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#include <stasis/util/latchStats.h>
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#ifndef __LATCHES_H
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#define __LATCHES_H
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/**
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A data structure for profiling latching behavior.
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All time values recorded in this struct are in microseconds.
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*/
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typedef struct {
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const char * file;
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int line;
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const char * name;
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pthread_mutex_t mutex;
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profile_tuple tup;
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char * last_acquired_at;
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/* pblHashTable_t * lockpoints; */
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void * lockpoints;
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} lladd_pthread_mutex_t;
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#include "rw.h"
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/**
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Keeps some profiling information along with a read/write lock.
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*/
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typedef struct {
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const char * file;
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int line;
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rwl * lock;
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profile_tuple tup;
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char * last_acquired_at;
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/* pblHashTable_t * lockpoints; */
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void * lockpoints;
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pthread_t holder;
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int readCount;
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} __profile_rwl;
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#ifdef PROFILE_LATCHES
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/*#define pthread_mutex_t lladd_pthread_mutex_t
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#define pthread_mutex_init(x, y) __lladd_pthread_mutex_init((x), (y), __FILE__, __LINE__, #x)
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#define pthread_mutex_destroy(x) __lladd_pthread_mutex_destroy((x))
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#define pthread_mutex_lock(x) __lladd_pthread_mutex_lock((x), __FILE__, __LINE__)
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#define pthread_mutex_unlock(x) __lladd_pthread_mutex_unlock((x))
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#define pthread_mutex_trylock(x) NO_PROFILING_EQUIVALENT_TO_PTHREAD_TRYLOCK
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#define pthread_cond_wait(x, y) __lladd_pthread_cond_wait((x), (y), __FILE__, __LINE__, #x, #y)
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#define pthread_cond_timedwait(x, y, z) __lladd_pthread_cond_timedwait((x), (y), (z), __FILE__, __LINE__, #x, #y)
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int __lladd_pthread_mutex_init(lladd_pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr, const char * file, int line, const char * mutex_name);
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int __lladd_pthread_mutex_lock(lladd_pthread_mutex_t *mutex, char * file, int line);
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int __lladd_pthread_mutex_unlock(lladd_pthread_mutex_t *mutex);
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int __lladd_pthread_mutex_destroy(lladd_pthread_mutex_t *mutex);
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int __lladd_pthread_cond_wait(pthread_cond_t *cond, lladd_pthread_mutex_t *mutex,
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char * file, int line, char * cond_name, char * mutex_name);
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// @param abstime should be const struct timespec, but GCC won't take that.
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int __lladd_pthread_cond_timedwait(pthread_cond_t *cond, lladd_pthread_mutex_t *mutex, void *abstime,
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char * file, int line, char * cond_name, char * mutex_name);
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*/
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#define initlock() __profile_rw_initlock(__FILE__, __LINE__)
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#define readlock(x, y) __profile_readlock((x),(y), __FILE__, __LINE__)
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#define writelock(x, y) __profile_writelock((x), (y), __FILE__, __LINE__)
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#define readunlock(x) __profile_readunlock((x))
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#define writeunlock(x) __profile_writeunlock((x))
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#define unlock(x) __profile_unlock((x))
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#define downgradelock(x) __profile_downgradelock((x))
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#define deletelock(x) __profile_deletelock((x))
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#define rwl __profile_rwl
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rwl *__profile_rw_initlock (char * file, int line);
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void __profile_readlock (rwl *lock, int d, char * file, int line);
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void __profile_writelock (rwl *lock, int d, char * file, int line);
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void __profile_readunlock (rwl *lock);
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void __profile_writeunlock (rwl *lock);
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void __profile_unlock (rwl *lock);
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void __profile_downgradelock (rwl *lock);
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void __profile_deletelock (rwl *lock);
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#endif
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#ifdef NO_LATCHES
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/* #define pthread_mutex_init(x, y) */
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/* #define pthread_mutex_destroy(x) */
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#define pthread_mutex_lock(x) 1
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#define pthread_mutex_unlock(x) 1
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#define pthread_mutex_trylock(x) 1
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#define pthread_cond_wait(x, y) 1
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#define pthread_cond_timedwait(x, y, z) 1
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/* #define initlock() */
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#define readlock(x, y) 1
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#define writelock(x, y) 1
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#define readunlock(x) 1
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#define writeunlock(x) 1
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#define unlock(x) 1
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#define downgradelock(x) 1
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/* #define deletelock(x) */
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#endif
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#ifdef HAVE_GCC_ATOMICS
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#define CAS(mutex,_a,_o,_n) __sync_bool_compare_and_swap(_a,_o,_n)
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#define BARRIER() __sync_synchronize()
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#define FETCH_AND_ADD(_o,_i) __sync_fetch_and_add(_o,_i)
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#if ULONG_MAX <= 4294967295 // are we on a 32 bit machine?
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#define ATOMIC_READ_64(mutex,_o) FETCH_AND_ADD(_o,0)
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#define ATOMIC_WRITE_64(mutex,_o,_n) _sync_lock_test_and_set(_o,_n)
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#else // this is a 33 or greater bit machine. Assume it's 64 bit, and that 64 bit writes are atomic.
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#define ATOMIC_READ_64(mutex,_a) *_a
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#define ATOMIC_WRITE_64(mutex,_a,_n) do {*_a=_n; } while (0)
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#endif
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#else
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#define CAS(mutex,_a,_o,_n) GCC_ATOMICS_REQUIRED
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#define BARRIER() GCC_ATOMICS_REQUIRED
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#define FETCH_AND_ADD(_a,_i) GCC_ATOMICS_REQUIRED
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#define ATOMIC_READ_64(mutex, _a) GCC_ATOMICS_REQUIRED
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#define ATOMIC_WRITE_64(mutex,_a,_n) GCC_ATOMICS_REQUIRED
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#endif
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#endif /* __LATCHES_H */
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