[FFmpeg-cvslog] lavc: add supports of OS/2 threads
KO Myung-Hun
git at videolan.org
Sun Nov 13 17:36:02 CET 2011
ffmpeg | branch: master | KO Myung-Hun <komh at chollian.net> | Wed Nov 2 00:00:21 2011 +0900| [ad0bdd2fd26a151404c505a1d610bf95773ae18f] | committer: Michael Niedermayer
lavc: add supports of OS/2 threads
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ad0bdd2fd26a151404c505a1d610bf95773ae18f
---
configure | 5 +-
libavcodec/Makefile | 1 +
libavcodec/os2threads.h | 162 +++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/pthread.c | 2 +
4 files changed, 169 insertions(+), 1 deletions(-)
diff --git a/configure b/configure
index d77f91b..9e2908b 100755
--- a/configure
+++ b/configure
@@ -94,6 +94,7 @@ Configuration options:
--disable-avfilter disable video filter support [no]
--disable-pthreads disable pthreads [auto]
--disable-w32threads disable Win32 threads [auto]
+ --disable-os2threads disable OS/2 threads [auto]
--enable-x11grab enable X11 grabbing [no]
--disable-network disable network support [no]
--enable-gray enable full grayscale support (slower color)
@@ -1069,6 +1070,7 @@ CONFIG_LIST="
THREADS_LIST='
pthreads
w32threads
+ os2threads
'
ARCH_LIST='
@@ -2656,6 +2658,7 @@ case $target_os in
emximp -o $(SUBDIR)$(LIBPREF)$(NAME)_dll.lib $(SUBDIR)$(NAME).def;'
SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(NAME)_dll.a $(LIBPREF)$(NAME)_dll.lib'
enable dos_paths
+ enable_weak os2threads
;;
gnu/kfreebsd)
add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_BSD_SOURCE
@@ -2995,7 +2998,7 @@ fi
# check for some common methods of building with pthread support
# do this before the optional library checks as some of them require pthreads
-if ! disabled pthreads && ! enabled w32threads; then
+if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
enable pthreads
if check_func pthread_create; then
:
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 03bc36a..598a877 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -688,6 +688,7 @@ OBJS-$(CONFIG_TEXT2MOVSUB_BSF) += movsub_bsf.o
# thread libraries
OBJS-$(HAVE_PTHREADS) += pthread.o
OBJS-$(HAVE_W32THREADS) += pthread.o
+OBJS-$(HAVE_OS2THREADS) += pthread.o
OBJS-$(CONFIG_MLIB) += mlib/dsputil_mlib.o \
diff --git a/libavcodec/os2threads.h b/libavcodec/os2threads.h
new file mode 100644
index 0000000..b816bff
--- /dev/null
+++ b/libavcodec/os2threads.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2011 KO Myung-Hun <komh at chollian.net>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * os2threads to pthreads wrapper
+ */
+
+#ifndef AVCODEC_OS2PTHREADS_H
+#define AVCODEC_OS2PTHREADS_H
+
+#define INCL_DOS
+#include <os2.h>
+
+#undef __STRICT_ANSI__ /* for _beginthread() */
+#include <stdlib.h>
+
+typedef TID pthread_t;
+typedef void pthread_attr_t;
+
+typedef HMTX pthread_mutex_t;
+typedef void pthread_mutexattr_t;
+
+typedef struct {
+ HEV event_sem;
+ int wait_count;
+} pthread_cond_t;
+
+typedef void pthread_condattr_t;
+
+struct thread_arg {
+ void *(*start_routine)(void *);
+ void *arg;
+};
+
+static void thread_entry(void *arg)
+{
+ struct thread_arg *thread_arg = arg;
+
+ thread_arg->start_routine(thread_arg->arg);
+
+ av_free(thread_arg);
+}
+
+static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg)
+{
+ struct thread_arg *thread_arg;
+
+ thread_arg = av_mallocz(sizeof(struct thread_arg));
+
+ thread_arg->start_routine = start_routine;
+ thread_arg->arg = arg;
+
+ *thread = _beginthread(thread_entry, NULL, 256 * 1024, thread_arg);
+
+ return 0;
+}
+
+static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
+{
+ DosWaitThread((PTID)&thread, DCWW_WAIT);
+
+ return 0;
+}
+
+static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
+{
+ DosCreateMutexSem(NULL, (PHMTX)mutex, 0, FALSE);
+
+ return 0;
+}
+
+static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
+{
+ DosCloseMutexSem(*(PHMTX)mutex);
+
+ return 0;
+}
+
+static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
+{
+ DosRequestMutexSem(*(PHMTX)mutex, SEM_INDEFINITE_WAIT);
+
+ return 0;
+}
+
+static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
+{
+ DosReleaseMutexSem(*(PHMTX)mutex);
+
+ return 0;
+}
+
+static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
+{
+ DosCreateEventSem(NULL, &cond->event_sem, DCE_POSTONE, FALSE);
+
+ cond->wait_count = 0;
+
+ return 0;
+}
+
+static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
+{
+ DosCloseEventSem(cond->event_sem);
+
+ return 0;
+}
+
+static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
+{
+ if (cond->wait_count > 0) {
+ DosPostEventSem(cond->event_sem);
+
+ cond->wait_count--;
+ }
+
+ return 0;
+}
+
+static av_always_inline int pthread_cond_broadcast(pthread_cond_t *cond)
+{
+ while (cond->wait_count > 0) {
+ DosPostEventSem(cond->event_sem);
+
+ cond->wait_count--;
+ }
+
+ return 0;
+}
+
+static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
+{
+ cond->wait_count++;
+
+ pthread_mutex_unlock(mutex);
+
+ DosWaitEventSem(cond->event_sem, SEM_INDEFINITE_WAIT);
+
+ pthread_mutex_lock(mutex);
+
+ return 0;
+}
+
+#endif /* AVCODEC_OS2PTHREADS_H */
diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index 04181e2..8eff782 100644
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -38,6 +38,8 @@
#include <pthread.h>
#elif HAVE_W32THREADS
#include "w32pthreads.h"
+#elif HAVE_OS2THREADS
+#include "os2threads.h"
#endif
typedef int (action_func)(AVCodecContext *c, void *arg);
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