Remove beosthreads support

Relevant BeOS variants support pthreads, so there is no need to
maintain the beos-native threads interface.

Originally committed as revision 23729 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -91,7 +91,6 @@ Configuration options:
   --enable-postproc        enable GPLed postprocessing support [no]
   --disable-avfilter       disable video filter support [no]
   --enable-avfilter-lavf   video filters dependent on avformat [no]
-  --enable-beosthreads     use BeOS threads [no]
   --enable-os2threads      use OS/2 threads [no]
   --enable-pthreads        use pthreads [no]
   --enable-w32threads      use Win32 threads [no]
@@ -954,7 +953,6 @@ CONFIG_LIST="
 "
 
 THREADS_LIST='
-    beosthreads
     os2threads
     pthreads
     w32threads

libavcodec/Makefile

@@ -599,7 +599,6 @@ OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF)       += remove_extradata_bsf.o
 OBJS-$(CONFIG_TEXT2MOVSUB_BSF)            += movsub_bsf.o
 
 # thread libraries
-OBJS-$(HAVE_BEOSTHREADS)               += beosthread.o
 OBJS-$(HAVE_OS2THREADS)                += os2thread.o
 OBJS-$(HAVE_PTHREADS)                  += pthread.o
 OBJS-$(HAVE_W32THREADS)                += w32thread.o

libavcodec/beosthread.c

-/*
- * Copyright (c) 2004 François Revol <revol@free.fr>
- *
- * 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
- */
-//#define DEBUG
-
-#include "avcodec.h"
-
-#include <OS.h>
-
-typedef struct ThreadContext{
-    AVCodecContext *avctx;
-    thread_id thread;
-    sem_id work_sem;
-    sem_id done_sem;
-    int (*func)(AVCodecContext *c, void *arg);
-    void *arg;
-    int ret;
-}ThreadContext;
-
-// it's odd Be never patented that :D
-struct benaphore {
-        vint32 atom;
-        sem_id sem;
-};
-static inline int lock_ben(struct benaphore *ben)
-{
-        if (atomic_add(&ben->atom, 1) > 0)
-                return acquire_sem(ben->sem);
-        return B_OK;
-}
-static inline int unlock_ben(struct benaphore *ben)
-{
-        if (atomic_add(&ben->atom, -1) > 1)
-                return release_sem(ben->sem);
-        return B_OK;
-}
-
-static struct benaphore av_thread_lib_ben;
-
-static int32 ff_thread_func(void *v){
-    ThreadContext *c= v;
-
-    for(;;){
-//printf("thread_func %X enter wait\n", (int)v); fflush(stdout);
-        acquire_sem(c->work_sem);
-//printf("thread_func %X after wait (func=%X)\n", (int)v, (int)c->func); fflush(stdout);
-        if(c->func)
-            c->ret= c->func(c->avctx, c->arg);
-        else
-            return 0;
-//printf("thread_func %X signal complete\n", (int)v); fflush(stdout);
-        release_sem(c->done_sem);
-    }
-
-    return B_OK;
-}
-
-/**
- * Free what has been allocated by avcodec_thread_init().
- * Must be called after decoding has finished, especially do not call while avcodec_thread_execute() is running.
- */
-void avcodec_thread_free(AVCodecContext *s){
-    ThreadContext *c= s->thread_opaque;
-    int i;
-    int32 ret;
-
-    for(i=0; i<s->thread_count; i++){
-
-        c[i].func= NULL;
-        release_sem(c[i].work_sem);
-        wait_for_thread(c[i].thread, &ret);
-        if(c[i].work_sem > B_OK) delete_sem(c[i].work_sem);
-        if(c[i].done_sem > B_OK) delete_sem(c[i].done_sem);
-    }
-
-    av_freep(&s->thread_opaque);
-}
-
-static int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
-    ThreadContext *c= s->thread_opaque;
-    int i;
-
-    assert(s == c->avctx);
-    assert(count <= s->thread_count);
-
-    /* note, we can be certain that this is not called with the same AVCodecContext by different threads at the same time */
-
-    for(i=0; i<count; i++){
-        c[i].arg= (char*)arg + i*size;
-        c[i].func= func;
-        c[i].ret= 12345;
-
-        release_sem(c[i].work_sem);
-    }
-    for(i=0; i<count; i++){
-        acquire_sem(c[i].done_sem);
-
-        c[i].func= NULL;
-        if(ret) ret[i]= c[i].ret;
-    }
-    return 0;
-}
-
-int avcodec_thread_init(AVCodecContext *s, int thread_count){
-    int i;
-    ThreadContext *c;
-
-    s->thread_count= thread_count;
-
-    if (thread_count <= 1)
-        return 0;
-
-    assert(!s->thread_opaque);
-    c= av_mallocz(sizeof(ThreadContext)*thread_count);
-    s->thread_opaque= c;
-
-    for(i=0; i<thread_count; i++){
-//printf("init semaphors %d\n", i); fflush(stdout);
-        c[i].avctx= s;
-
-        if((c[i].work_sem = create_sem(0, "ff work sem")) < B_OK)
-            goto fail;
-        if((c[i].done_sem = create_sem(0, "ff done sem")) < B_OK)
-            goto fail;
-
-//printf("create thread %d\n", i); fflush(stdout);
-        c[i].thread = spawn_thread(ff_thread_func, "libavcodec thread", B_LOW_PRIORITY, &c[i] );
-        if( c[i].thread < B_OK ) goto fail;
-        resume_thread(c[i].thread );
-    }
-//printf("init done\n"); fflush(stdout);
-
-    s->execute= avcodec_thread_execute;
-
-    return 0;
-fail:
-    avcodec_thread_free(s);
-    return -1;
-}
-
-/* provide a mean to serialize calls to avcodec_*() for thread safety. */
-
-int avcodec_thread_lock_lib(void)
-{
-        return lock_ben(&av_thread_lib_ben);
-}
-
-int avcodec_thread_unlock_lib(void)
-{
-        return unlock_ben(&av_thread_lib_ben);
-}
-
-/* our versions of _init and _fini (which are called by those actually from crt.o) */
-
-void initialize_after(void)
-{
-        av_thread_lib_ben.atom = 0;
-        av_thread_lib_ben.sem = create_sem(0, "libavcodec benaphore");
-}
-
-void uninitialize_before(void)
-{
-        delete_sem(av_thread_lib_ben.sem);
-}
-
-
-