misc/libopenalbridge/commands.c
author nemo
Sat, 25 Aug 2012 20:15:19 -0400
changeset 7604 c143c942b5fe
parent 3697 d5b30d6373fc
permissions -rw-r--r--
Hack to try and appease the shoppa players
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/*
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 *  commands.c
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 *  Hedgewars
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 *
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 *  Created by Vittorio on 13/06/10.
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 *  Copyright 2010 __MyCompanyName__. All rights reserved.
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 *
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 */
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#include "commands.h"
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#include "wrappers.h"
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ALfloat old_gain;
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extern ALuint *Sources;
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extern ALuint cache_size, cache_index, sources_number;
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extern ALboolean instances_number;
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extern al_sound_t *the_sounds;
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void openal_pausesound (uint32_t index) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSourcePause(Sources[the_sounds[index].source_index]);
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}
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void openal_stopsound (uint32_t index) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSourceStop(Sources[the_sounds[index].source_index]);
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}
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void openal_playsound (unsigned int index) {
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    ALboolean needsSource = AL_TRUE;
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    ALfloat SourcePosition[] = { 0.0, 0.0, 0.0 };
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    ALfloat SourceVelocity[] = { 0.0, 0.0, 0.0 };
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    ALint state;
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    int i, j;
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    if (openal_ready() == AL_TRUE && index < cache_size) {
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        // check if sound has already a source
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        if (the_sounds[index].source_index != -1) {
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            // it has a source, check it's not playing
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            alGetSourcei(Sources[the_sounds[index].source_index], AL_SOURCE_STATE, &state);
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            if (state != AL_PLAYING && state != AL_PAUSED) {
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                // it is not being played, so we can use it safely
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	            needsSource = AL_FALSE;
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            }
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            // else it is being played, so we have to allocate a new source for this buffer
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        }
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        if (needsSource) {
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#ifdef DEBUG
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            fprintf(stderr,"(Bridge Debug) - looking for a source for sound %d\n", index);
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#endif
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            for (i = 0; i < sources_number; i++) {
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                // let's iterate on Sources until we find a source that is not playing
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                alGetSourcei(Sources[i], AL_SOURCE_STATE, &state);
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                if (state != AL_PLAYING && state != AL_PAUSED) {
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                    // let's iterate on the_sounds until we find the sound using that source
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                    for (j = 0; j < cache_size; j++) {
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                        if (the_sounds[j].source_index == i) {
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                            the_sounds[j].source_index = -1;
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                            break;
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                        }
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                    }
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                    // here we know that no-one is using that source so we can use it
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                    break;
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                }
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            }
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            if (i == sources_number) {
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                // this means all sources are busy
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            }
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            // set source properties that it will use when it's in playback
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            alSourcei (Sources[i], AL_BUFFER,   the_sounds[index].buffer);
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            alSourcef (Sources[i], AL_PITCH,    1.0f);
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            alSourcef (Sources[i], AL_GAIN,     1.0f);
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            alSourcefv(Sources[i], AL_POSITION, SourcePosition);
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            alSourcefv(Sources[i], AL_VELOCITY, SourceVelocity);
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            alSourcei (Sources[i], AL_LOOPING,  0);
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            if (AL_NO_ERROR != alGetError()) {
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                fprintf(stderr,"(Bridge ERROR) - failed to set Source properties\n");
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                return;
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            }
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            the_sounds[index].source_index = i;
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        }
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        alSourcePlay(Sources[the_sounds[index].source_index]);
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        if (AL_NO_ERROR != alGetError()) {
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            fprintf(stderr,"(Bridge Warning) - failed to play sound %d\n", index);
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            return;
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        }
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    }
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}
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void openal_toggleloop (uint32_t index) {
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    ALint loop;
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    if (openal_ready() == AL_TRUE && index < cache_size) {
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        alGetSourcei (Sources[the_sounds[index].source_index], AL_LOOPING, &loop);
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        alSourcei (Sources[the_sounds[index].source_index], AL_LOOPING, !((uint8_t) loop) & 0x00000001);
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    }
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}
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void openal_setvolume (uint32_t index, float gain) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSourcef (Sources[the_sounds[index].source_index], AL_GAIN, gain);
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}
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void openal_setglobalvolume (float gain) {
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    if (openal_ready() == AL_TRUE)
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        alListenerf (AL_GAIN, gain);
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}
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void openal_togglemute () {
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    ALfloat gain;
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    if (openal_ready() == AL_TRUE) {
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        alGetListenerf (AL_GAIN, &gain);
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        if (gain > 0) {
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            old_gain = gain;
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            gain = 0;
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        } else
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            gain = old_gain;
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        alListenerf (AL_GAIN, gain);
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    }
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}
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// Fade in or out by calling a helper thread
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void openal_fade (uint32_t index, uint16_t quantity, al_fade_t direction) {
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#ifndef _WIN32
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    pthread_t thread;
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#else
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    HANDLE Thread;
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#endif
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    fade_t *fade;
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    if (openal_ready() == AL_TRUE && index < cache_size) {
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        fade = (fade_t*) Malloc(sizeof(fade_t));
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        fade->index = index;
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        fade->quantity = quantity;
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        fade->type = direction;
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#ifndef _WIN32
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        pthread_create(&thread, NULL, (void *)helper_fade, (void *)fade);
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        pthread_detach(thread);
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#else
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        Thread = (HANDLE) _beginthread((void *)helper_fade, 0, (void *)fade);
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#endif
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    }
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}
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void openal_setposition (uint32_t index, float x, float y, float z) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSource3f(Sources[the_sounds[index].source_index], AL_POSITION, x, y, z);;
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}
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void helper_fade(void *tmp) {
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    ALfloat gain;
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    ALfloat target_gain;
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    fade_t *fade;
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    uint32_t index;
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    uint16_t quantity;
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    al_fade_t type;
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    fade = tmp;
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    index = fade->index;
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    quantity = fade->quantity;
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    type = fade->type;
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    free (fade);
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    if (type == AL_FADE_IN) {
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#ifdef DEBUG
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        fprintf(stderr,"(Bridge Info) - Fade-in in progress [index %d quantity %d]", index, quantity);
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#endif
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        // save the volume desired after the fade
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        alGetSourcef(Sources[the_sounds[index].source_index], AL_GAIN, &target_gain);
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        if (target_gain > 1.0f || target_gain <= 0.0f)
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            target_gain = 1.0f;
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        for (gain = 0.0f ; gain <= target_gain; gain += (float) quantity/10000) {
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#ifdef TRACE
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            fprintf(stderr,"(Bridge Debug) - Fade-in set gain to %f\n", gain);
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#endif
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            alSourcef(Sources[the_sounds[index].source_index], AL_GAIN, gain);
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            usleep(10000);
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        }
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    } else {
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        alGetSourcef(Sources[the_sounds[index].source_index], AL_GAIN, &target_gain);
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        for (gain = target_gain; gain >= 0.00f; gain -= (float) quantity/10000) {
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#ifdef TRACE
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            fprintf(stderr,"(Bridge Debug) - Fade-out set gain to %f\n", gain);
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#endif
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            alSourcef(Sources[the_sounds[index].source_index], AL_GAIN, gain);
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            usleep(10000);
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        }
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        if (AL_NO_ERROR != alGetError())
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            fprintf(stderr,"(Bridge Warning) - Failed to set fade-out effect\n");
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        // stop that sound and reset its volume
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        alSourceStop (Sources[the_sounds[index].source_index]);
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        alSourcef (Sources[the_sounds[index].source_index], AL_GAIN, target_gain);
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    }
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    if (AL_NO_ERROR != alGetError())
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        fprintf(stderr,"(Bridge Warning) - Failed to set fade effect\n");
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#ifndef _WIN32
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    pthread_exit(NULL);
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#else
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    _endthread();
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#endif
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}
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