Remove OS/2 threads support

OS/2 SMP support is rare, and a pthreads library exists.
No need to keep this code.

Originally committed as revision 23731 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-os2threads      use OS/2 threads [no]
   --enable-pthreads        use pthreads [no]
   --enable-w32threads      use Win32 threads [no]
   --enable-x11grab         enable X11 grabbing [no]
@@ -953,7 +952,6 @@ CONFIG_LIST="
 "
 
 THREADS_LIST='
-    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-$(HAVE_OS2THREADS)                += os2thread.o
 OBJS-$(HAVE_PTHREADS)                  += pthread.o
 OBJS-$(HAVE_W32THREADS)                += w32thread.o
 

libavcodec/os2thread.c

@@ -1,148 +0,0 @@
-/*
- * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
- *
- * 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
-
-// Ported by Vlad Stelmahovsky
-
-#include "avcodec.h"
-
-#define INCL_DOS
-#define INCL_DOSERRORS
-#define INCL_DOSDEVIOCTL
-#include <os2.h>
-
-typedef struct ThreadContext{
-    AVCodecContext *avctx;
-    int thread;
-    HEV work_sem;
-    HEV done_sem;
-    int (*func)(AVCodecContext *c, void *arg);
-    void *arg;
-    int ret;
-}ThreadContext;
-
-
-static void attribute_align_arg thread_func(void *v){
-    ThreadContext *c= v;
-
-    for(;;){
-        //printf("thread_func %X enter wait\n", (int)v); fflush(stdout);
-        DosWaitEventSem(c->work_sem, SEM_INDEFINITE_WAIT);
-//        WaitForSingleObject(c->work_sem, INFINITE);
-//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;
-        //printf("thread_func %X signal complete\n", (int)v); fflush(stdout);
-        DosPostEventSem(c->done_sem);
-//        ReleaseSemaphore(c->done_sem, 1, 0);
-    }
-
-    return;
-}
-
-/**
- * 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;
-
-    for(i=0; i<s->thread_count; i++){
-
-        c[i].func= NULL;
-        DosPostEventSem(c[i].work_sem);
-        //        ReleaseSemaphore(c[i].work_sem, 1, 0);
-        DosWaitThread((PTID)&c[i].thread,DCWW_WAIT);
-//        WaitForSingleObject(c[i].thread, INFINITE);
-        if(c[i].work_sem) DosCloseEventSem(c[i].work_sem);//CloseHandle(c[i].work_sem);
-        if(c[i].done_sem) DosCloseEventSem(c[i].done_sem);//CloseHandle(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;
-
-        DosPostEventSem(c[i].work_sem);
-//        ReleaseSemaphore(c[i].work_sem, 1, 0);
-    }
-    for(i=0; i<count; i++){
-        DosWaitEventSem(c[i].done_sem,SEM_INDEFINITE_WAIT);
-//        WaitForSingleObject(c[i].done_sem, INFINITE);
-
-        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;
-    uint32_t threadid;
-
-    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 (DosCreateEventSem(NULL,&c[i].work_sem,DC_SEM_SHARED,0))
-            goto fail;
-        if (DosCreateEventSem(NULL,&c[i].done_sem,DC_SEM_SHARED,0))
-            goto fail;
-
-//printf("create thread %d\n", i); fflush(stdout);
-//        c[i].thread = (HANDLE)_beginthreadex(NULL, 0, thread_func, &c[i], 0, &threadid );
-        c[i].thread = _beginthread(thread_func, NULL, 0x10000, &c[i]);
-        if( c[i].thread <= 0 ) goto fail;
-    }
-//printf("init done\n"); fflush(stdout);
-
-    s->execute= avcodec_thread_execute;
-
-    return 0;
-fail:
-    avcodec_thread_free(s);
-    return -1;
-}