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| author | Jason Evans <jasone@canonware.com> | 2011-04-01 03:36:17 (GMT) |
|---|---|---|
| committer | Jason Evans <jasone@canonware.com> | 2011-04-01 03:36:17 (GMT) |
| commit | 7427525c28d58c423a68930160e3b0fe577fe953 (patch) | |
| tree | 471519cfe8e156dfaa8e3f6f4f7d92db423b81f3 /src/mutex.c | |
| parent | 64ba3d7cd9901ed00d690365b1b3da6aa7b9cd59 (diff) | |
| download | jemalloc-7427525c28d58c423a68930160e3b0fe577fe953.zip jemalloc-7427525c28d58c423a68930160e3b0fe577fe953.tar.gz jemalloc-7427525c28d58c423a68930160e3b0fe577fe953.tar.bz2 | |
Move repo contents in jemalloc/ to top level.
Diffstat (limited to 'src/mutex.c')
| -rw-r--r-- | src/mutex.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/mutex.c b/src/mutex.c new file mode 100644 index 0000000..ca89ef1 --- /dev/null +++ b/src/mutex.c @@ -0,0 +1,90 @@ +#define JEMALLOC_MUTEX_C_ +#include "jemalloc/internal/jemalloc_internal.h" + +/******************************************************************************/ +/* Data. */ + +#ifdef JEMALLOC_LAZY_LOCK +bool isthreaded = false; +#endif + +#ifdef JEMALLOC_LAZY_LOCK +static void pthread_create_once(void); +#endif + +/******************************************************************************/ +/* + * We intercept pthread_create() calls in order to toggle isthreaded if the + * process goes multi-threaded. + */ + +#ifdef JEMALLOC_LAZY_LOCK +static int (*pthread_create_fptr)(pthread_t *__restrict, const pthread_attr_t *, + void *(*)(void *), void *__restrict); + +static void +pthread_create_once(void) +{ + + pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create"); + if (pthread_create_fptr == NULL) { + malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, " + "\"pthread_create\")\n"); + abort(); + } + + isthreaded = true; +} + +JEMALLOC_ATTR(visibility("default")) +int +pthread_create(pthread_t *__restrict thread, + const pthread_attr_t *__restrict attr, void *(*start_routine)(void *), + void *__restrict arg) +{ + static pthread_once_t once_control = PTHREAD_ONCE_INIT; + + pthread_once(&once_control, pthread_create_once); + + return (pthread_create_fptr(thread, attr, start_routine, arg)); +} +#endif + +/******************************************************************************/ + +bool +malloc_mutex_init(malloc_mutex_t *mutex) +{ +#ifdef JEMALLOC_OSSPIN + *mutex = 0; +#else + pthread_mutexattr_t attr; + + if (pthread_mutexattr_init(&attr) != 0) + return (true); +#ifdef PTHREAD_MUTEX_ADAPTIVE_NP + pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP); +#else + pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_DEFAULT); +#endif + if (pthread_mutex_init(mutex, &attr) != 0) { + pthread_mutexattr_destroy(&attr); + return (true); + } + pthread_mutexattr_destroy(&attr); + +#endif + return (false); +} + +void +malloc_mutex_destroy(malloc_mutex_t *mutex) +{ + +#ifndef JEMALLOC_OSSPIN + if (pthread_mutex_destroy(mutex) != 0) { + malloc_write("<jemalloc>: Error in pthread_mutex_destroy()\n"); + abort(); + } +#endif +} |