w32pthreads: move from lavc to compat/

It will be used in other places than lavc.

4 files changed, 2 insertions, 282 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f94b7725ee..acc2a934ff 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -679,7 +679,6 @@ SKIPHEADERS-$(CONFIG_MPEG_XVMC_DECODER) += xvmc.h
 SKIPHEADERS-$(CONFIG_VAAPI)            += vaapi_internal.h
 SKIPHEADERS-$(CONFIG_VDA)              += vda.h
 SKIPHEADERS-$(CONFIG_VDPAU)            += vdpau.h
-SKIPHEADERS-$(HAVE_W32THREADS)         += w32pthreads.h
 
 EXAMPLES = api
 
diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index 9855b3587b..7eac335f74 100644
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -58,7 +58,7 @@
 #if HAVE_PTHREADS
 #include <pthread.h>
 #elif HAVE_W32THREADS
-#include "w32pthreads.h"
+#include "compat/w32pthreads.h"
 #endif
 
 typedef int (action_func)(AVCodecContext *c, void *arg);
diff --git a/libavcodec/vp8.h b/libavcodec/vp8.h
index 8631c8f5db..6ec3879667 100644
--- a/libavcodec/vp8.h
+++ b/libavcodec/vp8.h
@@ -36,7 +36,7 @@
 #if HAVE_PTHREADS
 #include <pthread.h>
 #elif HAVE_W32THREADS
-#include "w32pthreads.h"
+#include "compat/w32pthreads.h"
 #endif
 
 #define VP8_MAX_QUANT 127
diff --git a/libavcodec/w32pthreads.h b/libavcodec/w32pthreads.h
deleted file mode 100644
index c58da49a61..0000000000
--- a/libavcodec/w32pthreads.h
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * Copyright (C) 2010-2011 x264 project
- *
- * Authors: Steven Walters <kemuri9@gmail.com>
- *          Pegasys Inc. <http://www.pegasys-inc.com>
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * w32threads to pthreads wrapper
- */
-
-#ifndef AVCODEC_W32PTHREADS_H
-#define AVCODEC_W32PTHREADS_H
-
-/* Build up a pthread-like API using underlying Windows API. Have only static
- * methods so as to not conflict with a potentially linked in pthread-win32
- * library.
- * As most functions here are used without checking return values,
- * only implement return values as necessary. */
-
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-#include <process.h>
-
-#include "libavutil/internal.h"
-#include "libavutil/mem.h"
-
-typedef struct pthread_t {
-    void *handle;
-    void *(*func)(void* arg);
-    void *arg;
-    void *ret;
-} pthread_t;
-
-/* the conditional variable api for windows 6.0+ uses critical sections and
- * not mutexes */
-typedef CRITICAL_SECTION pthread_mutex_t;
-
-/* This is the CONDITIONAL_VARIABLE typedef for using Window's native
- * conditional variables on kernels 6.0+.
- * MinGW does not currently have this typedef. */
-typedef struct pthread_cond_t {
-    void *ptr;
-} pthread_cond_t;
-
-/* function pointers to conditional variable API on windows 6.0+ kernels */
-static void (WINAPI *cond_broadcast)(pthread_cond_t *cond);
-static void (WINAPI *cond_init)(pthread_cond_t *cond);
-static void (WINAPI *cond_signal)(pthread_cond_t *cond);
-static BOOL (WINAPI *cond_wait)(pthread_cond_t *cond, pthread_mutex_t *mutex,
-                                DWORD milliseconds);
-
-static unsigned __stdcall attribute_align_arg win32thread_worker(void *arg)
-{
-    pthread_t *h = arg;
-    h->ret = h->func(h->arg);
-    return 0;
-}
-
-static int pthread_create(pthread_t *thread, const void *unused_attr,
-                          void *(*start_routine)(void*), void *arg)
-{
-    thread->func   = start_routine;
-    thread->arg    = arg;
-    thread->handle = (void*)_beginthreadex(NULL, 0, win32thread_worker, thread,
-                                           0, NULL);
-    return !thread->handle;
-}
-
-static void pthread_join(pthread_t thread, void **value_ptr)
-{
-    DWORD ret = WaitForSingleObject(thread.handle, INFINITE);
-    if (ret != WAIT_OBJECT_0)
-        return;
-    if (value_ptr)
-        *value_ptr = thread.ret;
-    CloseHandle(thread.handle);
-}
-
-static inline int pthread_mutex_init(pthread_mutex_t *m, void* attr)
-{
-    InitializeCriticalSection(m);
-    return 0;
-}
-static inline int pthread_mutex_destroy(pthread_mutex_t *m)
-{
-    DeleteCriticalSection(m);
-    return 0;
-}
-static inline int pthread_mutex_lock(pthread_mutex_t *m)
-{
-    EnterCriticalSection(m);
-    return 0;
-}
-static inline int pthread_mutex_unlock(pthread_mutex_t *m)
-{
-    LeaveCriticalSection(m);
-    return 0;
-}
-
-/* for pre-Windows 6.0 platforms we need to define and use our own condition
- * variable and api */
-typedef struct  win32_cond_t {
-    pthread_mutex_t mtx_broadcast;
-    pthread_mutex_t mtx_waiter_count;
-    volatile int waiter_count;
-    HANDLE semaphore;
-    HANDLE waiters_done;
-    volatile int is_broadcast;
-} win32_cond_t;
-
-static void pthread_cond_init(pthread_cond_t *cond, const void *unused_attr)
-{
-    win32_cond_t *win32_cond = NULL;
-    if (cond_init) {
-        cond_init(cond);
-        return;
-    }
-
-    /* non native condition variables */
-    win32_cond = av_mallocz(sizeof(win32_cond_t));
-    if (!win32_cond)
-        return;
-    cond->ptr = win32_cond;
-    win32_cond->semaphore = CreateSemaphore(NULL, 0, 0x7fffffff, NULL);
-    if (!win32_cond->semaphore)
-        return;
-    win32_cond->waiters_done = CreateEvent(NULL, TRUE, FALSE, NULL);
-    if (!win32_cond->waiters_done)
-        return;
-
-    pthread_mutex_init(&win32_cond->mtx_waiter_count, NULL);
-    pthread_mutex_init(&win32_cond->mtx_broadcast, NULL);
-}
-
-static void pthread_cond_destroy(pthread_cond_t *cond)
-{
-    win32_cond_t *win32_cond = cond->ptr;
-    /* native condition variables do not destroy */
-    if (cond_init)
-        return;
-
-    /* non native condition variables */
-    CloseHandle(win32_cond->semaphore);
-    CloseHandle(win32_cond->waiters_done);
-    pthread_mutex_destroy(&win32_cond->mtx_waiter_count);
-    pthread_mutex_destroy(&win32_cond->mtx_broadcast);
-    av_freep(&win32_cond);
-    cond->ptr = NULL;
-}
-
-static void pthread_cond_broadcast(pthread_cond_t *cond)
-{
-    win32_cond_t *win32_cond = cond->ptr;
-    int have_waiter;
-
-    if (cond_broadcast) {
-        cond_broadcast(cond);
-        return;
-    }
-
-    /* non native condition variables */
-    pthread_mutex_lock(&win32_cond->mtx_broadcast);
-    pthread_mutex_lock(&win32_cond->mtx_waiter_count);
-    have_waiter = 0;
-
-    if (win32_cond->waiter_count) {
-        win32_cond->is_broadcast = 1;
-        have_waiter = 1;
-    }
-
-    if (have_waiter) {
-        ReleaseSemaphore(win32_cond->semaphore, win32_cond->waiter_count, NULL);
-        pthread_mutex_unlock(&win32_cond->mtx_waiter_count);
-        WaitForSingleObject(win32_cond->waiters_done, INFINITE);
-        ResetEvent(win32_cond->waiters_done);
-        win32_cond->is_broadcast = 0;
-    } else
-        pthread_mutex_unlock(&win32_cond->mtx_waiter_count);
-    pthread_mutex_unlock(&win32_cond->mtx_broadcast);
-}
-
-static int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
-{
-    win32_cond_t *win32_cond = cond->ptr;
-    int last_waiter;
-    if (cond_wait) {
-        cond_wait(cond, mutex, INFINITE);
-        return 0;
-    }
-
-    /* non native condition variables */
-    pthread_mutex_lock(&win32_cond->mtx_broadcast);
-    pthread_mutex_lock(&win32_cond->mtx_waiter_count);
-    win32_cond->waiter_count++;
-    pthread_mutex_unlock(&win32_cond->mtx_waiter_count);
-    pthread_mutex_unlock(&win32_cond->mtx_broadcast);
-
-    // unlock the external mutex
-    pthread_mutex_unlock(mutex);
-    WaitForSingleObject(win32_cond->semaphore, INFINITE);
-
-    pthread_mutex_lock(&win32_cond->mtx_waiter_count);
-    win32_cond->waiter_count--;
-    last_waiter = !win32_cond->waiter_count || !win32_cond->is_broadcast;
-    pthread_mutex_unlock(&win32_cond->mtx_waiter_count);
-
-    if (last_waiter)
-        SetEvent(win32_cond->waiters_done);
-
-    // lock the external mutex
-    return pthread_mutex_lock(mutex);
-}
-
-static void pthread_cond_signal(pthread_cond_t *cond)
-{
-    win32_cond_t *win32_cond = cond->ptr;
-    int have_waiter;
-    if (cond_signal) {
-        cond_signal(cond);
-        return;
-    }
-
-    pthread_mutex_lock(&win32_cond->mtx_broadcast);
-
-    /* non-native condition variables */
-    pthread_mutex_lock(&win32_cond->mtx_waiter_count);
-    have_waiter = win32_cond->waiter_count;
-    pthread_mutex_unlock(&win32_cond->mtx_waiter_count);
-
-    if (have_waiter) {
-        ReleaseSemaphore(win32_cond->semaphore, 1, NULL);
-        WaitForSingleObject(win32_cond->waiters_done, INFINITE);
-        ResetEvent(win32_cond->waiters_done);
-    }
-
-    pthread_mutex_unlock(&win32_cond->mtx_broadcast);
-}
-
-static void w32thread_init(void)
-{
-#if _WIN32_WINNT < 0x0600
-    HANDLE kernel_dll = GetModuleHandle(TEXT("kernel32.dll"));
-    /* if one is available, then they should all be available */
-    cond_init      =
-        (void*)GetProcAddress(kernel_dll, "InitializeConditionVariable");
-    cond_broadcast =
-        (void*)GetProcAddress(kernel_dll, "WakeAllConditionVariable");
-    cond_signal    =
-        (void*)GetProcAddress(kernel_dll, "WakeConditionVariable");
-    cond_wait      =
-        (void*)GetProcAddress(kernel_dll, "SleepConditionVariableCS");
-#else
-    cond_init      = InitializeConditionVariable;
-    cond_broadcast = WakeAllConditionVariable;
-    cond_signal    = WakeConditionVariable;
-    cond_wait      = SleepConditionVariableCS;
-#endif
-
-}
-
-#endif /* AVCODEC_W32PTHREADS_H */