diff options
author | Chris Robinson <chris.kcat@gmail.com> | 2014-05-06 18:57:42 -0700 |
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committer | Chris Robinson <chris.kcat@gmail.com> | 2014-05-06 18:57:42 -0700 |
commit | fa12855d198d7701747539da05802519ce866030 (patch) | |
tree | 03d48047ccef1f1e167ebd865451ef1a836c32ae /Alc | |
parent | 0ea979a262d4409a830354cbbc6eb3bea6f455a3 (diff) |
Move threads.c to a separate source dir
This will eventually serve to build a static lib of common wrapper methods,
such as threads, mutexes, atomics, etc.
Diffstat (limited to 'Alc')
-rw-r--r-- | Alc/threads.c | 531 |
1 files changed, 0 insertions, 531 deletions
diff --git a/Alc/threads.c b/Alc/threads.c deleted file mode 100644 index 06036685..00000000 --- a/Alc/threads.c +++ /dev/null @@ -1,531 +0,0 @@ -/** - * OpenAL cross platform audio library - * Copyright (C) 1999-2007 by authors. - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - * Or go to http://www.gnu.org/copyleft/lgpl.html - */ - -#include "config.h" - -#include "threads.h" - -#include <stdlib.h> -#include <errno.h> - -#include "alMain.h" -#include "alThunk.h" - - -extern inline althrd_t althrd_current(void); -extern inline int althrd_equal(althrd_t thr0, althrd_t thr1); -extern inline void althrd_exit(int res); -extern inline void althrd_yield(void); - -extern inline int almtx_lock(almtx_t *mtx); -extern inline int almtx_unlock(almtx_t *mtx); -extern inline int almtx_trylock(almtx_t *mtx); - -extern inline void *altss_get(altss_t tss_id); -extern inline int altss_set(altss_t tss_id, void *val); - - -#define THREAD_STACK_SIZE (1*1024*1024) /* 1MB */ - -#ifdef _WIN32 - -#define WIN32_LEAN_AND_MEAN -#include <windows.h> -#include <mmsystem.h> - - -void althrd_setname(althrd_t thr, const char *name) -{ -#if defined(_MSC_VER) -#define MS_VC_EXCEPTION 0x406D1388 -#pragma pack(push,8) - struct { - DWORD dwType; // Must be 0x1000. - LPCSTR szName; // Pointer to name (in user addr space). - DWORD dwThreadID; // Thread ID (-1=caller thread). - DWORD dwFlags; // Reserved for future use, must be zero. - } info; -#pragma pack(pop) - info.dwType = 0x1000; - info.szName = name; - info.dwThreadID = thr; - info.dwFlags = 0; - - __try { - RaiseException(MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info); - } - __except(EXCEPTION_CONTINUE_EXECUTION) { - } -#undef MS_VC_EXCEPTION -#else - TRACE("Can't set thread %04lx name to \"%s\"\n", thr, name); -#endif -} - - -static UIntMap ThrdIdHandle = UINTMAP_STATIC_INITIALIZE; - -static void NTAPI althrd_callback(void* UNUSED(handle), DWORD reason, void* UNUSED(reserved)) -{ - if(reason == DLL_PROCESS_DETACH) - ResetUIntMap(&ThrdIdHandle); -} -#ifdef _MSC_VER -#pragma section(".CRT$XLC",read) -__declspec(allocate(".CRT$XLC")) PIMAGE_TLS_CALLBACK althrd_callback_ = althrd_callback; -#elif defined(__GNUC__) -PIMAGE_TLS_CALLBACK althrd_callback_ __attribute__((section(".CRT$XLC"))) = althrd_callback; -#else -PIMAGE_TLS_CALLBACK althrd_callback_ = althrd_callback; -#endif - - -typedef struct thread_cntr { - althrd_start_t func; - void *arg; -} thread_cntr; - -static DWORD WINAPI althrd_starter(void *arg) -{ - thread_cntr cntr; - memcpy(&cntr, arg, sizeof(cntr)); - free(arg); - - return (DWORD)((*cntr.func)(cntr.arg)); -} - - -int althrd_create(althrd_t *thr, althrd_start_t func, void *arg) -{ - thread_cntr *cntr; - DWORD thrid; - HANDLE hdl; - - cntr = malloc(sizeof(*cntr)); - if(!cntr) return althrd_nomem; - - cntr->func = func; - cntr->arg = arg; - - hdl = CreateThread(NULL, THREAD_STACK_SIZE, althrd_starter, cntr, 0, &thrid); - if(!hdl) - { - free(cntr); - return althrd_error; - } - InsertUIntMapEntry(&ThrdIdHandle, thrid, hdl); - - *thr = thrid; - return althrd_success; -} - -int althrd_detach(althrd_t thr) -{ - HANDLE hdl = RemoveUIntMapKey(&ThrdIdHandle, thr); - if(!hdl) return althrd_error; - - CloseHandle(hdl); - return althrd_success; -} - -int althrd_join(althrd_t thr, int *res) -{ - DWORD code; - - HANDLE hdl = RemoveUIntMapKey(&ThrdIdHandle, thr); - if(!hdl) return althrd_error; - - WaitForSingleObject(hdl, INFINITE); - GetExitCodeThread(hdl, &code); - CloseHandle(hdl); - - *res = (int)code; - return althrd_success; -} - -int althrd_sleep(const struct timespec *ts, struct timespec* UNUSED(rem)) -{ - DWORD msec; - - if(ts->tv_sec < 0 || ts->tv_sec >= (0x7fffffff / 1000) || - ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000) - return -2; - - msec = (DWORD)(ts->tv_sec * 1000); - msec += (DWORD)((ts->tv_nsec+999999) / 1000000); - Sleep(msec); - - return 0; -} - - -int almtx_init(almtx_t *mtx, int type) -{ - if(!mtx) return althrd_error; - type &= ~(almtx_recursive|almtx_timed); - if(type != almtx_plain) - return althrd_error; - - InitializeCriticalSection(mtx); - return althrd_success; -} - -void almtx_destroy(almtx_t *mtx) -{ - DeleteCriticalSection(mtx); -} - -int almtx_timedlock(almtx_t *mtx, const struct timespec *ts) -{ - int ret; - - if(!mtx || !ts) - return althrd_error; - - while((ret=almtx_trylock(mtx)) == althrd_busy) - { - struct timespec now; - - if(ts->tv_sec < 0 || ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000 || - altimespec_get(&now, AL_TIME_UTC) != AL_TIME_UTC) - return althrd_error; - if(now.tv_sec > ts->tv_sec || (now.tv_sec == ts->tv_sec && now.tv_nsec >= ts->tv_nsec)) - return althrd_timedout; - - althrd_yield(); - } - - return ret; -} - - -/* An associative map of uint:void* pairs. The key is the TLS index (given by - * TlsAlloc), and the value is the altss_dtor_t callback. When a thread exits, - * we iterate over the TLS indices for their thread-local value and call the - * destructor function with it if they're both not NULL. To avoid using - * DllMain, a PIMAGE_TLS_CALLBACK function pointer is placed in a ".CRT$XLx" - * section (where x is a character A to Z) which will be called by the CRT. - */ -static UIntMap TlsDestructors = UINTMAP_STATIC_INITIALIZE; - -static void NTAPI altss_callback(void* UNUSED(handle), DWORD reason, void* UNUSED(reserved)) -{ - ALsizei i; - - if(reason == DLL_PROCESS_DETACH) - { - ResetUIntMap(&TlsDestructors); - return; - } - if(reason != DLL_THREAD_DETACH) - return; - - LockUIntMapRead(&TlsDestructors); - for(i = 0;i < TlsDestructors.size;i++) - { - void *ptr = altss_get(TlsDestructors.array[i].key); - altss_dtor_t callback = (altss_dtor_t)TlsDestructors.array[i].value; - if(ptr && callback) - callback(ptr); - } - UnlockUIntMapRead(&TlsDestructors); -} -#ifdef _MSC_VER -#pragma section(".CRT$XLB",read) -__declspec(allocate(".CRT$XLB")) PIMAGE_TLS_CALLBACK altss_callback_ = altss_callback; -#elif defined(__GNUC__) -PIMAGE_TLS_CALLBACK altss_callback_ __attribute__((section(".CRT$XLB"))) = altss_callback; -#else -#warning "No TLS callback support, thread-local contexts may leak references on poorly written applications." -PIMAGE_TLS_CALLBACK altss_callback_ = altss_callback; -#endif - -int altss_create(altss_t *tss_id, altss_dtor_t callback) -{ - DWORD key = TlsAlloc(); - if(key == TLS_OUT_OF_INDEXES) - return althrd_error; - - *tss_id = key; - if(callback != NULL) - InsertUIntMapEntry(&TlsDestructors, key, callback); - return althrd_success; -} - -void altss_delete(altss_t tss_id) -{ - RemoveUIntMapKey(&TlsDestructors, tss_id); - TlsFree(tss_id); -} - - -int altimespec_get(struct timespec *ts, int base) -{ - if(base == AL_TIME_UTC) - { - union { - FILETIME ftime; - ULARGE_INTEGER ulint; - } systime; - GetSystemTimeAsFileTime(&systime.ftime); - /* FILETIME is in 100-nanosecond units, or 1/10th of a microsecond. */ - ts->tv_sec = systime.ulint.QuadPart/10000000; - ts->tv_nsec = (systime.ulint.QuadPart%10000000) * 100; - return base; - } - - return 0; -} - - -void alcall_once(alonce_flag *once, void (*callback)(void)) -{ - LONG ret; - while((ret=InterlockedExchange(once, 1)) == 1) - althrd_yield(); - if(ret == 0) - (*callback)(); - InterlockedExchange(once, 2); -} - -#else - -#include <sys/time.h> -#include <unistd.h> -#include <pthread.h> -#ifdef HAVE_PTHREAD_NP_H -#include <pthread_np.h> -#endif - - -extern inline int althrd_sleep(const struct timespec *ts, struct timespec *rem); -extern inline void alcall_once(alonce_flag *once, void (*callback)(void)); - - -void althrd_setname(althrd_t thr, const char *name) -{ -#if defined(HAVE_PTHREAD_SETNAME_NP) -#if defined(__GNUC__) - if(pthread_setname_np(thr, name) != 0) -#elif defined(__APPLE__) - if(!althrd_equal(thr, althrd_current()) - WARN("Can't set thread name \"%s\" on non-current thread"); - else if(pthread_setname_np(name) != 0) -#endif - WARN("Failed to set thread name to \"%s\": %s\n", name, strerror(errno)); -#elif defined(HAVE_PTHREAD_SET_NAME_NP) - pthread_set_name_np(thr, name); -#else - TRACE("Can't set thread name to \"%s\"\n", name); -#endif -} - - -typedef struct thread_cntr { - althrd_start_t func; - void *arg; -} thread_cntr; - -static void *althrd_starter(void *arg) -{ - thread_cntr cntr; - memcpy(&cntr, arg, sizeof(cntr)); - free(arg); - - return (void*)(intptr_t)((*cntr.func)(cntr.arg)); -} - - -int althrd_create(althrd_t *thr, althrd_start_t func, void *arg) -{ - thread_cntr *cntr; - pthread_attr_t attr; - - cntr = malloc(sizeof(*cntr)); - if(!cntr) return althrd_nomem; - - if(pthread_attr_init(&attr) != 0) - { - free(cntr); - return althrd_error; - } - if(pthread_attr_setstacksize(&attr, THREAD_STACK_SIZE) != 0) - { - pthread_attr_destroy(&attr); - free(cntr); - return althrd_error; - } - - cntr->func = func; - cntr->arg = arg; - if(pthread_create(thr, &attr, althrd_starter, cntr) != 0) - { - pthread_attr_destroy(&attr); - free(cntr); - return althrd_error; - } - pthread_attr_destroy(&attr); - - return althrd_success; -} - -int althrd_detach(althrd_t thr) -{ - if(pthread_detach(thr) != 0) - return althrd_error; - return althrd_success; -} - -int althrd_join(althrd_t thr, int *res) -{ - void *code; - - if(!res) return althrd_error; - - if(pthread_join(thr, &code) != 0) - return althrd_error; - *res = (int)(intptr_t)code; - return althrd_success; -} - - -int almtx_init(almtx_t *mtx, int type) -{ - int ret; - - if(!mtx) return althrd_error; - if((type&~(almtx_recursive|almtx_timed)) != 0) - return althrd_error; - - type &= ~almtx_timed; - if(type == almtx_plain) - ret = pthread_mutex_init(mtx, NULL); - else - { - pthread_mutexattr_t attr; - - ret = pthread_mutexattr_init(&attr); - if(ret) return althrd_error; - - if(type == almtx_recursive) - { - ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); -#ifdef HAVE_PTHREAD_MUTEXATTR_SETKIND_NP - if(ret != 0) - ret = pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE); -#endif - } - else - ret = 1; - if(ret == 0) - ret = pthread_mutex_init(mtx, &attr); - pthread_mutexattr_destroy(&attr); - } - return ret ? althrd_error : althrd_success; -} - -void almtx_destroy(almtx_t *mtx) -{ - pthread_mutex_destroy(mtx); -} - -int almtx_timedlock(almtx_t *mtx, const struct timespec *ts) -{ - int ret; - -#ifdef HAVE_PTHREAD_MUTEX_TIMEDLOCK - ret = pthread_mutex_timedlock(mtx, ts); - switch(ret) - { - case 0: return althrd_success; - case ETIMEDOUT: return althrd_timedout; - case EBUSY: return althrd_busy; - } - return althrd_error; -#else - if(!mtx || !ts) - return althrd_error; - - while((ret=almtx_trylock(mtx)) == althrd_busy) - { - struct timespec now; - - if(ts->tv_sec < 0 || ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000 || - altimespec_get(&now, AL_TIME_UTC) != AL_TIME_UTC) - return althrd_error; - if(now.tv_sec > ts->tv_sec || (now.tv_sec == ts->tv_sec && now.tv_nsec >= ts->tv_nsec)) - return althrd_timedout; - - althrd_yield(); - } - - return ret; -#endif -} - - -int altss_create(altss_t *tss_id, altss_dtor_t callback) -{ - if(pthread_key_create(tss_id, callback) != 0) - return althrd_error; - return althrd_success; -} - -void altss_delete(altss_t tss_id) -{ - pthread_key_delete(tss_id); -} - - -int altimespec_get(struct timespec *ts, int base) -{ - if(base == AL_TIME_UTC) - { - int ret; -#if _POSIX_TIMERS > 0 - ret = clock_gettime(CLOCK_REALTIME, ts); - if(ret == 0) return base; -#else /* _POSIX_TIMERS > 0 */ - struct timeval tv; - ret = gettimeofday(&tv, NULL); - if(ret == 0) - { - ts->tv_sec = tv.tv_sec; - ts->tv_nsec = tv.tv_usec * 1000; - return base; - } -#endif - } - - return 0; -} - -#endif - - -void al_nssleep(time_t sec, long nsec) -{ - struct timespec ts, rem; - ts.tv_sec = sec; - ts.tv_nsec = nsec; - - while(althrd_sleep(&ts, &rem) == -1) - ts = rem; -} |