Commit 1ab52ffc authored by Yaowu Xu's avatar Yaowu Xu

port aom_thread.h change from libvpx/nextgenv2

Change-Id: Ib81aa1f1eb7a41116a9a94696925c7d5038e21bd
parent 6b70f005
......@@ -35,11 +35,26 @@ extern "C" {
#include <windows.h> // NOLINT
typedef HANDLE pthread_t;
typedef CRITICAL_SECTION pthread_mutex_t;
#if _WIN32_WINNT >= 0x0600 // Windows Vista / Server 2008 or greater
#define USE_WINDOWS_CONDITION_VARIABLE
typedef CONDITION_VARIABLE pthread_cond_t;
#else
typedef struct {
HANDLE waiting_sem_;
HANDLE received_sem_;
HANDLE signal_event_;
} pthread_cond_t;
#endif // _WIN32_WINNT >= 0x600
#ifndef WINAPI_FAMILY_PARTITION
#define WINAPI_PARTITION_DESKTOP 1
#define WINAPI_FAMILY_PARTITION(x) x
#endif
#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
#define USE_CREATE_THREAD
#endif
//------------------------------------------------------------------------------
// simplistic pthread emulation layer
......@@ -48,14 +63,26 @@ typedef struct {
#define THREADFN unsigned int __stdcall
#define THREAD_RETURN(val) (unsigned int)((DWORD_PTR)val)
#if _WIN32_WINNT >= 0x0501 // Windows XP or greater
#define WaitForSingleObject(obj, timeout) \
WaitForSingleObjectEx(obj, timeout, FALSE /*bAlertable*/)
#endif
static INLINE int pthread_create(pthread_t *const thread, const void *attr,
unsigned int(__stdcall *start)(void *),
void *arg) {
(void)attr;
#ifdef USE_CREATE_THREAD
*thread = CreateThread(NULL, /* lpThreadAttributes */
0, /* dwStackSize */
start, arg, 0, /* dwStackSize */
NULL); /* lpThreadId */
#else
*thread = (pthread_t)_beginthreadex(NULL, /* void *security */
0, /* unsigned stack_size */
start, arg, 0, /* unsigned initflag */
NULL); /* unsigned *thrdaddr */
#endif
if (*thread == NULL) return 1;
SetThreadPriority(*thread, THREAD_PRIORITY_ABOVE_NORMAL);
return 0;
......@@ -71,7 +98,11 @@ static INLINE int pthread_join(pthread_t thread, void **value_ptr) {
static INLINE int pthread_mutex_init(pthread_mutex_t *const mutex,
void *mutexattr) {
(void)mutexattr;
#if _WIN32_WINNT >= 0x0600 // Windows Vista / Server 2008 or greater
InitializeCriticalSectionEx(mutex, 0 /*dwSpinCount*/, 0 /*Flags*/);
#else
InitializeCriticalSection(mutex);
#endif
return 0;
}
......@@ -97,15 +128,22 @@ static INLINE int pthread_mutex_destroy(pthread_mutex_t *const mutex) {
// Condition
static INLINE int pthread_cond_destroy(pthread_cond_t *const condition) {
int ok = 1;
#ifdef USE_WINDOWS_CONDITION_VARIABLE
(void)condition;
#else
ok &= (CloseHandle(condition->waiting_sem_) != 0);
ok &= (CloseHandle(condition->received_sem_) != 0);
ok &= (CloseHandle(condition->signal_event_) != 0);
#endif
return !ok;
}
static INLINE int pthread_cond_init(pthread_cond_t *const condition,
void *cond_attr) {
(void)cond_attr;
#ifdef USE_WINDOWS_CONDITION_VARIABLE
InitializeConditionVariable(condition);
#else
condition->waiting_sem_ = CreateSemaphore(NULL, 0, MAX_DECODE_THREADS, NULL);
condition->received_sem_ = CreateSemaphore(NULL, 0, MAX_DECODE_THREADS, NULL);
condition->signal_event_ = CreateEvent(NULL, FALSE, FALSE, NULL);
......@@ -114,11 +152,15 @@ static INLINE int pthread_cond_init(pthread_cond_t *const condition,
pthread_cond_destroy(condition);
return 1;
}
#endif
return 0;
}
static INLINE int pthread_cond_signal(pthread_cond_t *const condition) {
int ok = 1;
#ifdef USE_WINDOWS_CONDITION_VARIABLE
WakeConditionVariable(condition);
#else
if (WaitForSingleObject(condition->waiting_sem_, 0) == WAIT_OBJECT_0) {
// a thread is waiting in pthread_cond_wait: allow it to be notified
ok = SetEvent(condition->signal_event_);
......@@ -127,12 +169,16 @@ static INLINE int pthread_cond_signal(pthread_cond_t *const condition) {
ok &= (WaitForSingleObject(condition->received_sem_, INFINITE) !=
WAIT_OBJECT_0);
}
#endif
return !ok;
}
static INLINE int pthread_cond_wait(pthread_cond_t *const condition,
pthread_mutex_t *const mutex) {
int ok;
#ifdef USE_WINDOWS_CONDITION_VARIABLE
ok = SleepConditionVariableCS(condition, mutex, INFINITE);
#else
// note that there is a consumer available so the signal isn't dropped in
// pthread_cond_signal
if (!ReleaseSemaphore(condition->waiting_sem_, 1, NULL)) return 1;
......@@ -142,6 +188,152 @@ static INLINE int pthread_cond_wait(pthread_cond_t *const condition,
WAIT_OBJECT_0);
ok &= ReleaseSemaphore(condition->received_sem_, 1, NULL);
pthread_mutex_lock(mutex);
#endif
return !ok;
}
#elif defined(__OS2__)
#define INCL_DOS
#include <os2.h> // NOLINT
#include <errno.h> // NOLINT
#include <stdlib.h> // NOLINT
#include <sys/builtin.h> // NOLINT
#define pthread_t TID
#define pthread_mutex_t HMTX
typedef struct {
HEV event_sem_;
HEV ack_sem_;
volatile unsigned wait_count_;
} pthread_cond_t;
//------------------------------------------------------------------------------
// simplistic pthread emulation layer
#define THREADFN void *
#define THREAD_RETURN(val) (val)
typedef struct {
void *(*start_)(void *);
void *arg_;
} thread_arg;
static void thread_start(void *arg) {
thread_arg targ = *(thread_arg *)arg;
free(arg);
targ.start_(targ.arg_);
}
static INLINE int pthread_create(pthread_t *const thread, const void *attr,
void *(*start)(void *), void *arg) {
int tid;
thread_arg *targ = (thread_arg *)malloc(sizeof(*targ));
if (targ == NULL) return 1;
(void)attr;
targ->start_ = start;
targ->arg_ = arg;
tid = (pthread_t)_beginthread(thread_start, NULL, 1024 * 1024, targ);
if (tid == -1) {
free(targ);
return 1;
}
*thread = tid;
return 0;
}
static INLINE int pthread_join(pthread_t thread, void **value_ptr) {
(void)value_ptr;
return DosWaitThread(&thread, DCWW_WAIT) != 0;
}
// Mutex
static INLINE int pthread_mutex_init(pthread_mutex_t *const mutex,
void *mutexattr) {
(void)mutexattr;
return DosCreateMutexSem(NULL, mutex, 0, FALSE) != 0;
}
static INLINE int pthread_mutex_trylock(pthread_mutex_t *const mutex) {
return DosRequestMutexSem(*mutex, SEM_IMMEDIATE_RETURN) == 0 ? 0 : EBUSY;
}
static INLINE int pthread_mutex_lock(pthread_mutex_t *const mutex) {
return DosRequestMutexSem(*mutex, SEM_INDEFINITE_WAIT) != 0;
}
static INLINE int pthread_mutex_unlock(pthread_mutex_t *const mutex) {
return DosReleaseMutexSem(*mutex) != 0;
}
static INLINE int pthread_mutex_destroy(pthread_mutex_t *const mutex) {
return DosCloseMutexSem(*mutex) != 0;
}
// Condition
static INLINE int pthread_cond_destroy(pthread_cond_t *const condition) {
int ok = 1;
ok &= DosCloseEventSem(condition->event_sem_) == 0;
ok &= DosCloseEventSem(condition->ack_sem_) == 0;
return !ok;
}
static INLINE int pthread_cond_init(pthread_cond_t *const condition,
void *cond_attr) {
int ok = 1;
(void)cond_attr;
ok &=
DosCreateEventSem(NULL, &condition->event_sem_, DCE_POSTONE, FALSE) == 0;
ok &= DosCreateEventSem(NULL, &condition->ack_sem_, DCE_POSTONE, FALSE) == 0;
if (!ok) {
pthread_cond_destroy(condition);
return 1;
}
condition->wait_count_ = 0;
return 0;
}
static INLINE int pthread_cond_signal(pthread_cond_t *const condition) {
int ok = 1;
if (!__atomic_cmpxchg32(&condition->wait_count_, 0, 0)) {
ok &= DosPostEventSem(condition->event_sem_) == 0;
ok &= DosWaitEventSem(condition->ack_sem_, SEM_INDEFINITE_WAIT) == 0;
}
return !ok;
}
static INLINE int pthread_cond_broadcast(pthread_cond_t *const condition) {
int ok = 1;
while (!__atomic_cmpxchg32(&condition->wait_count_, 0, 0))
ok &= pthread_cond_signal(condition) == 0;
return !ok;
}
static INLINE int pthread_cond_wait(pthread_cond_t *const condition,
pthread_mutex_t *const mutex) {
int ok = 1;
__atomic_increment(&condition->wait_count_);
ok &= pthread_mutex_unlock(mutex) == 0;
ok &= DosWaitEventSem(condition->event_sem_, SEM_INDEFINITE_WAIT) == 0;
__atomic_decrement(&condition->wait_count_);
ok &= DosPostEventSem(condition->ack_sem_) == 0;
pthread_mutex_lock(mutex);
return !ok;
}
#else // _WIN32
......
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