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-rw-r--r--Changelog2
-rw-r--r--compat/w32pthreads.h266
-rwxr-xr-xconfigure13
-rw-r--r--libavcodec/pthread_frame.c4
-rw-r--r--libavcodec/pthread_slice.c4
-rw-r--r--libavfilter/pthread.c4
-rw-r--r--libavutil/slicethread.c4
7 files changed, 19 insertions, 278 deletions
diff --git a/Changelog b/Changelog
index f44cec6..2ebdf00 100644
--- a/Changelog
+++ b/Changelog
@@ -28,6 +28,8 @@ version <next>:
- nsp demuxer
- support LibreSSL (via libtls)
- AVX-512/ZMM support added
+- Dropped support for building for Windows XP. The minimum supported Windows
+ version is Windows Vista.
version 3.4:
diff --git a/compat/w32pthreads.h b/compat/w32pthreads.h
index eeead60..237cab5 100644
--- a/compat/w32pthreads.h
+++ b/compat/w32pthreads.h
@@ -56,19 +56,12 @@ typedef struct pthread_t {
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 CONDITION_VARIABLE typedef for using Windows' native
- * conditional variables on kernels 6.0+. */
-#if HAVE_CONDITION_VARIABLE_PTR
+/* use light weight mutex/condition variable API for Windows Vista and later */
+typedef SRWLOCK pthread_mutex_t;
typedef CONDITION_VARIABLE pthread_cond_t;
-#else
-typedef struct pthread_cond_t {
- void *Ptr;
-} pthread_cond_t;
-#endif
+
+#define PTHREAD_MUTEX_INITIALIZER SRWLOCK_INIT
+#define PTHREAD_COND_INITIALIZER CONDITION_VARIABLE_INIT
#if _WIN32_WINNT >= 0x0600
#define InitializeCriticalSection(x) InitializeCriticalSectionEx(x, 0, 0)
@@ -114,26 +107,25 @@ static av_unused int pthread_join(pthread_t thread, void **value_ptr)
static inline int pthread_mutex_init(pthread_mutex_t *m, void* attr)
{
- InitializeCriticalSection(m);
+ InitializeSRWLock(m);
return 0;
}
static inline int pthread_mutex_destroy(pthread_mutex_t *m)
{
- DeleteCriticalSection(m);
+ /* Unlocked SWR locks use no resources */
return 0;
}
static inline int pthread_mutex_lock(pthread_mutex_t *m)
{
- EnterCriticalSection(m);
+ AcquireSRWLockExclusive(m);
return 0;
}
static inline int pthread_mutex_unlock(pthread_mutex_t *m)
{
- LeaveCriticalSection(m);
+ ReleaseSRWLockExclusive(m);
return 0;
}
-#if _WIN32_WINNT >= 0x0600
typedef INIT_ONCE pthread_once_t;
#define PTHREAD_ONCE_INIT INIT_ONCE_STATIC_INIT
@@ -167,7 +159,7 @@ static inline int pthread_cond_broadcast(pthread_cond_t *cond)
static inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
{
- SleepConditionVariableCS(cond, mutex, INFINITE);
+ SleepConditionVariableSRW(cond, mutex, INFINITE, 0);
return 0;
}
@@ -177,242 +169,4 @@ static inline int pthread_cond_signal(pthread_cond_t *cond)
return 0;
}
-#else // _WIN32_WINNT < 0x0600
-
-/* atomic init state of dynamically loaded functions */
-static LONG w32thread_init_state = 0;
-static av_unused void w32thread_init(void);
-
-/* for pre-Windows 6.0 platforms, define INIT_ONCE struct,
- * compatible to the one used in the native API */
-
-typedef union pthread_once_t {
- void * Ptr; ///< For the Windows 6.0+ native functions
- LONG state; ///< For the pre-Windows 6.0 compat code
-} pthread_once_t;
-
-#define PTHREAD_ONCE_INIT {0}
-
-/* function pointers to init once API on windows 6.0+ kernels */
-static BOOL (WINAPI *initonce_begin)(pthread_once_t *lpInitOnce, DWORD dwFlags, BOOL *fPending, void **lpContext);
-static BOOL (WINAPI *initonce_complete)(pthread_once_t *lpInitOnce, DWORD dwFlags, void *lpContext);
-
-/* pre-Windows 6.0 compat using a spin-lock */
-static inline void w32thread_once_fallback(LONG volatile *state, void (*init_routine)(void))
-{
- switch (InterlockedCompareExchange(state, 1, 0)) {
- /* Initial run */
- case 0:
- init_routine();
- InterlockedExchange(state, 2);
- break;
- /* Another thread is running init */
- case 1:
- while (1) {
- MemoryBarrier();
- if (*state == 2)
- break;
- Sleep(0);
- }
- break;
- /* Initialization complete */
- case 2:
- break;
- }
-}
-
-static av_unused int pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
-{
- w32thread_once_fallback(&w32thread_init_state, w32thread_init);
-
- /* Use native functions on Windows 6.0+ */
- if (initonce_begin && initonce_complete) {
- BOOL pending = FALSE;
- initonce_begin(once_control, 0, &pending, NULL);
- if (pending)
- init_routine();
- initonce_complete(once_control, 0, NULL);
- return 0;
- }
-
- w32thread_once_fallback(&once_control->state, init_routine);
- 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;
-
-/* 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 av_unused int pthread_cond_init(pthread_cond_t *cond, const void *unused_attr)
-{
- win32_cond_t *win32_cond = NULL;
-
- w32thread_once_fallback(&w32thread_init_state, w32thread_init);
-
- if (cond_init) {
- cond_init(cond);
- return 0;
- }
-
- /* non native condition variables */
- win32_cond = (win32_cond_t*)av_mallocz(sizeof(win32_cond_t));
- if (!win32_cond)
- return ENOMEM;
- cond->Ptr = win32_cond;
- win32_cond->semaphore = CreateSemaphore(NULL, 0, 0x7fffffff, NULL);
- if (!win32_cond->semaphore)
- return ENOMEM;
- win32_cond->waiters_done = CreateEvent(NULL, TRUE, FALSE, NULL);
- if (!win32_cond->waiters_done)
- return ENOMEM;
-
- pthread_mutex_init(&win32_cond->mtx_waiter_count, NULL);
- pthread_mutex_init(&win32_cond->mtx_broadcast, NULL);
- return 0;
-}
-
-static av_unused int pthread_cond_destroy(pthread_cond_t *cond)
-{
- win32_cond_t *win32_cond = (win32_cond_t*)cond->Ptr;
- /* native condition variables do not destroy */
- if (cond_init)
- return 0;
-
- /* 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;
- return 0;
-}
-
-static av_unused int pthread_cond_broadcast(pthread_cond_t *cond)
-{
- win32_cond_t *win32_cond = (win32_cond_t*)cond->Ptr;
- int have_waiter;
-
- if (cond_broadcast) {
- cond_broadcast(cond);
- return 0;
- }
-
- /* 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);
- return 0;
-}
-
-static av_unused int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
-{
- win32_cond_t *win32_cond = (win32_cond_t*)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 av_unused int pthread_cond_signal(pthread_cond_t *cond)
-{
- win32_cond_t *win32_cond = (win32_cond_t*)cond->Ptr;
- int have_waiter;
- if (cond_signal) {
- cond_signal(cond);
- return 0;
- }
-
- 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);
- return 0;
-}
-#endif
-
-static av_unused void w32thread_init(void)
-{
-#if _WIN32_WINNT < 0x0600
- HMODULE kernel_dll = GetModuleHandle(TEXT("kernel32.dll"));
- /* if one is available, then they should all be available */
- cond_init = (void (WINAPI*)(pthread_cond_t *))
- GetProcAddress(kernel_dll, "InitializeConditionVariable");
- cond_broadcast = (void (WINAPI*)(pthread_cond_t *))
- GetProcAddress(kernel_dll, "WakeAllConditionVariable");
- cond_signal = (void (WINAPI*)(pthread_cond_t *))
- GetProcAddress(kernel_dll, "WakeConditionVariable");
- cond_wait = (BOOL (WINAPI*)(pthread_cond_t *, pthread_mutex_t *, DWORD))
- GetProcAddress(kernel_dll, "SleepConditionVariableCS");
- initonce_begin = (BOOL (WINAPI*)(pthread_once_t *, DWORD, BOOL *, void **))
- GetProcAddress(kernel_dll, "InitOnceBeginInitialize");
- initonce_complete = (BOOL (WINAPI*)(pthread_once_t *, DWORD, void *))
- GetProcAddress(kernel_dll, "InitOnceComplete");
-#endif
-
-}
-
#endif /* COMPAT_W32PTHREADS_H */
diff --git a/configure b/configure
index d3187d7..19a0f31 100755
--- a/configure
+++ b/configure
@@ -2092,7 +2092,6 @@ TOOLCHAIN_FEATURES="
"
TYPES_LIST="
- CONDITION_VARIABLE_Ptr
kCMVideoCodecType_HEVC
socklen_t
struct_addrinfo
@@ -5159,6 +5158,8 @@ probe_libc(){
add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
eval test \$${pfx_no_}cc_type = "gcc" &&
add_${pfx}cppflags -D__printf__=__gnu_printf__
+ check_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+ add_${pfx}cppflags -D_WIN32_WINNT=0x0600
elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION" ||
check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
eval ${pfx}libc_type=mingw32
@@ -5168,8 +5169,8 @@ probe_libc(){
add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
- check_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
- add_${pfx}cppflags -D_WIN32_WINNT=0x0502
+ check_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+ add_${pfx}cppflags -D_WIN32_WINNT=0x0600
eval test \$${pfx_no_}cc_type = "gcc" &&
add_${pfx}cppflags -D__printf__=__gnu_printf__
elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
@@ -5189,14 +5190,14 @@ probe_libc(){
# 0x601 by default unless something else is set by the user.
# This can easily lead to us detecting functions only present
# in such new versions and producing binaries requiring windows 7.0.
- # Therefore explicitly set the default to XP unless the user has
+ # Therefore explicitly set the default to Vista unless the user has
# set something else on the command line.
# Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
# family. For these cases, configure is free to use any functions
# found in the SDK headers by default. (Alternatively, we could force
# _WIN32_WINNT to 0x0602 in that case.)
check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
- { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
+ { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0600; }
#ifdef WINAPI_FAMILY
#include <winapifamily.h>
#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
@@ -5674,7 +5675,6 @@ check_func_headers windows.h SetConsoleTextAttribute
check_func_headers windows.h SetConsoleCtrlHandler
check_func_headers windows.h Sleep
check_func_headers windows.h VirtualAlloc
-check_struct windows.h "CONDITION_VARIABLE" Ptr
check_func_headers glob.h glob
enabled xlib &&
check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
@@ -5758,6 +5758,7 @@ check_cpp_condition windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP
if ! disabled w32threads && ! enabled pthreads; then
check_func_headers "windows.h process.h" _beginthreadex &&
+ check_type "windows.h" CONDITION_VARIABLE &&
enable w32threads || disable w32threads
if ! enabled w32threads && enabled winrt; then
check_func_headers "windows.h" CreateThread &&
diff --git a/libavcodec/pthread_frame.c b/libavcodec/pthread_frame.c
index e6e6d1f..25aa3e2 100644
--- a/libavcodec/pthread_frame.c
+++ b/libavcodec/pthread_frame.c
@@ -728,10 +728,6 @@ int ff_frame_thread_init(AVCodecContext *avctx)
FrameThreadContext *fctx;
int i, err = 0;
-#if HAVE_W32THREADS
- w32thread_init();
-#endif
-
if (!thread_count) {
int nb_cpus = av_cpu_count();
#if FF_API_DEBUG_MV
diff --git a/libavcodec/pthread_slice.c b/libavcodec/pthread_slice.c
index d659f9b..77cfe3c 100644
--- a/libavcodec/pthread_slice.c
+++ b/libavcodec/pthread_slice.c
@@ -132,10 +132,6 @@ int ff_slice_thread_init(AVCodecContext *avctx)
int thread_count = avctx->thread_count;
static void (*mainfunc)(void *);
-#if HAVE_W32THREADS
- w32thread_init();
-#endif
-
// We cannot do this in the encoder init as the threads are created before
if (av_codec_is_encoder(avctx->codec) &&
avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO &&
diff --git a/libavfilter/pthread.c b/libavfilter/pthread.c
index 567dd4c..7e37c73 100644
--- a/libavfilter/pthread.c
+++ b/libavfilter/pthread.c
@@ -85,10 +85,6 @@ int ff_graph_thread_init(AVFilterGraph *graph)
{
int ret;
-#if HAVE_W32THREADS
- w32thread_init();
-#endif
-
if (graph->nb_threads == 1) {
graph->thread_type = 0;
return 0;
diff --git a/libavutil/slicethread.c b/libavutil/slicethread.c
index c43f87a..dfbe551 100644
--- a/libavutil/slicethread.c
+++ b/libavutil/slicethread.c
@@ -99,10 +99,6 @@ int avpriv_slicethread_create(AVSliceThread **pctx, void *priv,
AVSliceThread *ctx;
int nb_workers, i;
-#if HAVE_W32THREADS
- w32thread_init();
-#endif
-
av_assert0(nb_threads >= 0);
if (!nb_threads) {
int nb_cpus = av_cpu_count();
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