diff options
Diffstat (limited to 'src/3rdparty/ptmalloc/sysdeps/pthread/malloc-machine.h')
-rw-r--r-- | src/3rdparty/ptmalloc/sysdeps/pthread/malloc-machine.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/3rdparty/ptmalloc/sysdeps/pthread/malloc-machine.h b/src/3rdparty/ptmalloc/sysdeps/pthread/malloc-machine.h new file mode 100644 index 0000000000..137a711b4f --- /dev/null +++ b/src/3rdparty/ptmalloc/sysdeps/pthread/malloc-machine.h @@ -0,0 +1,131 @@ +/* Basic platform-independent macro definitions for mutexes, + thread-specific data and parameters for malloc. + Posix threads (pthreads) version. + Copyright (C) 2004 Wolfram Gloger <wg@malloc.de>. + +Permission to use, copy, modify, distribute, and sell this software +and its documentation for any purpose is hereby granted without fee, +provided that (i) the above copyright notices and this permission +notice appear in all copies of the software and related documentation, +and (ii) the name of Wolfram Gloger may not be used in any advertising +or publicity relating to the software. + +THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, +EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY +WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + +IN NO EVENT SHALL WOLFRAM GLOGER BE LIABLE FOR ANY SPECIAL, +INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY +DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY +OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. +*/ + +#ifndef _PTHREAD_MALLOC_MACHINE_H +#define _PTHREAD_MALLOC_MACHINE_H + +#include <pthread.h> + +#undef thread_atfork_static + +/* Use fast inline spinlocks with gcc. */ +#if (defined __i386__ || defined __x86_64__) && defined __GNUC__ && \ + !defined USE_NO_SPINLOCKS + +#include <time.h> +#include <sched.h> + +typedef struct { + volatile unsigned int lock; + int pad0_; +} mutex_t; + +#define MUTEX_INITIALIZER { 0 } +#define mutex_init(m) ((m)->lock = 0) +static inline int mutex_lock(mutex_t *m) { + int cnt = 0, r; + struct timespec tm; + + for(;;) { + __asm__ __volatile__ + ("xchgl %0, %1" + : "=r"(r), "=m"(m->lock) + : "0"(1), "m"(m->lock) + : "memory"); + if(!r) + return 0; + if(cnt < 50) { + sched_yield(); + cnt++; + } else { + tm.tv_sec = 0; + tm.tv_nsec = 2000001; + nanosleep(&tm, NULL); + cnt = 0; + } + } +} +static inline int mutex_trylock(mutex_t *m) { + int r; + + __asm__ __volatile__ + ("xchgl %0, %1" + : "=r"(r), "=m"(m->lock) + : "0"(1), "m"(m->lock) + : "memory"); + return r; +} +static inline int mutex_unlock(mutex_t *m) { + __asm__ __volatile__ ("movl %1, %0" : "=m" (m->lock) : "g"(0) : "memory"); + return 0; +} + +#else + +/* Normal pthread mutex. */ +typedef pthread_mutex_t mutex_t; + +#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER +#define mutex_init(m) pthread_mutex_init(m, NULL) +#define mutex_lock(m) pthread_mutex_lock(m) +#define mutex_trylock(m) pthread_mutex_trylock(m) +#define mutex_unlock(m) pthread_mutex_unlock(m) + +#endif /* (__i386__ || __x86_64__) && __GNUC__ && !USE_NO_SPINLOCKS */ + +/* thread specific data */ +#if defined(__sgi) || defined(USE_TSD_DATA_HACK) + +/* Hack for thread-specific data, e.g. on Irix 6.x. We can't use + pthread_setspecific because that function calls malloc() itself. + The hack only works when pthread_t can be converted to an integral + type. */ + +typedef void *tsd_key_t[256]; +#define tsd_key_create(key, destr) do { \ + int i; \ + for(i=0; i<256; i++) (*key)[i] = 0; \ +} while(0) +#define tsd_setspecific(key, data) \ + (key[(unsigned)pthread_self() % 256] = (data)) +#define tsd_getspecific(key, vptr) \ + (vptr = key[(unsigned)pthread_self() % 256]) + +#else + +typedef pthread_key_t tsd_key_t; + +#define tsd_key_create(key, destr) pthread_key_create(key, destr) +#define tsd_setspecific(key, data) pthread_setspecific(key, data) +#define tsd_getspecific(key, vptr) (vptr = pthread_getspecific(key)) + +#endif + +/* at fork */ +#define thread_atfork(prepare, parent, child) \ + pthread_atfork(prepare, parent, child) + +#include <sysdeps/generic/malloc-machine.h> + +#endif /* !defined(_MALLOC_MACHINE_H) */ |