263 lines
7.9 KiB
C++
263 lines
7.9 KiB
C++
/*
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Copyright (C) 2004-2008 Grame
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Copyright (C) 2013 Samsung Electronics
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "JackAndroidSemaphore.h"
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#include "JackTools.h"
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#include "JackConstants.h"
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#include "JackError.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include "IAndroidShm.h"
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#include "shm.h"
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#include "android/Shm.h" //android extension of shm.h
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namespace Jack
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{
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pthread_mutex_t JackAndroidSemaphore::mutex = PTHREAD_MUTEX_INITIALIZER;
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void JackAndroidSemaphore::BuildName(const char* client_name, const char* server_name, char* res, int size)
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{
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char ext_client_name[SYNC_MAX_NAME_SIZE + 1];
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JackTools::RewriteName(client_name, ext_client_name);
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if (getenv("JACK_PROMISCUOUS_SERVER")) {
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snprintf(res, size, "jack_sem.%s_%s", server_name, ext_client_name);
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} else {
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snprintf(res, size, "jack_sem.%d_%s_%s", JackTools::GetUID(), server_name, ext_client_name);
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}
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}
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bool JackAndroidSemaphore::Signal()
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{
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int res;
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if (!fSemaphore) {
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jack_error("JackAndroidSemaphore::Signal name = %s already deallocated!!", fName);
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return false;
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}
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if (fFlush)
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return true;
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if ((res = sem_post(fSemaphore)) != 0) {
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jack_error("JackAndroidSemaphore::Signal name = %s err = %s", fName, strerror(errno));
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}
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return (res == 0);
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}
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bool JackAndroidSemaphore::SignalAll()
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{
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int res;
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if (!fSemaphore) {
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jack_error("JackAndroidSemaphore::SignalAll name = %s already deallocated!!", fName);
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return false;
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}
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if (fFlush)
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return true;
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if ((res = sem_post(fSemaphore)) != 0) {
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jack_error("JackAndroidSemaphore::SignalAll name = %s err = %s", fName, strerror(errno));
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}
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return (res == 0);
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}
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/*
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bool JackAndroidSemaphore::Wait()
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{
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int res;
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if (!fSemaphore) {
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jack_error("JackAndroidSemaphore::Wait name = %s already deallocated!!", fName);
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return false;
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}
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if ((res = sem_wait(fSemaphore)) != 0) {
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jack_error("JackAndroidSemaphore::Wait name = %s err = %s", fName, strerror(errno));
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}
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return (res == 0);
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}
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*/
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bool JackAndroidSemaphore::Wait()
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{
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int res;
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while ((res = sem_wait(fSemaphore) < 0)) {
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jack_error("JackAndroidSemaphore::Wait name = %s err = %s", fName, strerror(errno));
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if (errno != EINTR) {
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break;
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}
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}
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return (res == 0);
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}
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bool JackAndroidSemaphore::TimedWait(long usec)
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{
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int res;
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struct timeval now;
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timespec time;
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if (!fSemaphore) {
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jack_error("JackAndroidSemaphore::TimedWait name = %s already deallocated!!", fName);
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return false;
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}
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gettimeofday(&now, 0);
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time.tv_sec = now.tv_sec + usec / 1000000;
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long tv_usec = (now.tv_usec + (usec % 1000000));
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time.tv_sec += tv_usec / 1000000;
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time.tv_nsec = (tv_usec % 1000000) * 1000;
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while ((res = sem_timedwait(fSemaphore, &time)) < 0) {
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jack_error("JackAndroidSemaphore::TimedWait err = %s", strerror(errno));
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jack_log("JackAndroidSemaphore::TimedWait now : %ld %ld ", now.tv_sec, now.tv_usec);
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jack_log("JackAndroidSemaphore::TimedWait next : %ld %ld ", time.tv_sec, time.tv_nsec/1000);
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if (errno == ETIMEDOUT) {
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timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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ts.tv_sec = time.tv_sec - ts.tv_sec;
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ts.tv_nsec = time.tv_nsec - ts.tv_nsec;
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if (ts.tv_nsec < 0) {
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ts.tv_nsec += 1000000000;
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ts.tv_sec -= 1;
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}
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if (ts.tv_sec < 0 || ts.tv_nsec < 0) {
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jack_error("JackAndroidSemaphore::TimedWait time may changed or client killed already! wait again!");
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gettimeofday(&now, 0);
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time.tv_sec = now.tv_sec + usec / 1000000;
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long tv_usec = (now.tv_usec + (usec % 1000000));
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time.tv_sec += tv_usec / 1000000;
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time.tv_nsec = (tv_usec % 1000000) * 1000;
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if ((res = sem_timedwait(fSemaphore, &time)) < 0) {
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jack_error("JackAndroidSemaphore::TimedWait err = %s", strerror(errno));
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jack_log("JackAndroidSemaphore::TimedWait now : %ld %ld ", now.tv_sec, now.tv_usec);
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jack_log("JackAndroidSemaphore::TimedWait next : %ld %ld ", time.tv_sec, time.tv_nsec/1000);
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}
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}
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}
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if (errno != EINTR) {
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break;
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}
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}
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return (res == 0);
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}
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// Server side : publish the semaphore in the global namespace
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bool JackAndroidSemaphore::Allocate(const char* name, const char* server_name, int value)
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{
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pthread_mutex_lock (&mutex);
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BuildName(name, server_name, fName, sizeof(fName));
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jack_log("JackAndroidSemaphore::Allocate name = %s val = %ld", fName, value);
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android::sp<android::IAndroidShm> service = android::Shm::getShmService();
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if(service == NULL){
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jack_error("shm service is null");
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return false;
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}
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fSemaphoreMemory = service->InitSemaphore(fName);
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if(fSemaphoreMemory != NULL){
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fSemaphore = (sem_t*)(fSemaphoreMemory->getBase());
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}
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if(fSemaphore == NULL) {
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jack_error("Allocate: can't check in named semaphore name = %s err = %s", fName, strerror(errno));
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pthread_mutex_unlock (&mutex);
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return false;
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} else {
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sem_init(fSemaphore, 1, 0);
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jack_log("sem_init()");
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pthread_mutex_unlock (&mutex);
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return true;
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}
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}
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// Client side : get the published semaphore from server
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bool JackAndroidSemaphore::ConnectInput(const char* name, const char* server_name)
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{
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pthread_mutex_lock (&mutex);
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BuildName(name, server_name, fName, sizeof(fName));
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jack_log("JackAndroidSemaphore::Connect name = %s", fName);
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// Temporary...
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if (fSemaphore) {
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jack_log("Already connected name = %s", name);
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pthread_mutex_unlock (&mutex);
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return true;
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}
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android::sp<android::IAndroidShm> service = android::Shm::getShmService();
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if(service == NULL){
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jack_error("shm service is null");
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return false;
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}
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fSemaphoreMemory = service->InitSemaphore(fName);
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if(fSemaphoreMemory != NULL){
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fSemaphore = (sem_t*)(fSemaphoreMemory->getBase());
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}
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if(fSemaphore == NULL) {
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jack_error("Connect: can't connect named semaphore name = %s err = %s", fName, strerror(errno));
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pthread_mutex_unlock (&mutex);
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return false;
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} else {
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int val = 0;
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sem_getvalue(fSemaphore, &val);
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jack_log("JackAndroidSemaphore::Connect sem_getvalue %ld", val);
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pthread_mutex_unlock (&mutex);
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return true;
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}
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}
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bool JackAndroidSemaphore::Connect(const char* name, const char* server_name)
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{
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return ConnectInput(name, server_name);
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}
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bool JackAndroidSemaphore::ConnectOutput(const char* name, const char* server_name)
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{
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return ConnectInput(name, server_name);
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}
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bool JackAndroidSemaphore::Disconnect()
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{
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if (fSemaphore) {
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jack_log("JackAndroidSemaphore::Disconnect name = %s", fName);
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fSemaphore = NULL;
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}
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return true;
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}
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// Server side : destroy the semaphore
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void JackAndroidSemaphore::Destroy()
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{
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if (fSemaphore != NULL) {
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jack_log("JackAndroidSemaphore::Disconnect name = %s", fName);
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fSemaphore = NULL;
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} else {
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jack_error("JackAndroidSemaphore::Destroy semaphore == NULL");
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}
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}
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} // end of namespace
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