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/*
Copyright (C) 2004-2008 Grame
Copyright (C) 2013 Samsung Electronics
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "JackAndroidSemaphore.h"
#include "JackTools.h"
#include "JackConstants.h"
#include "JackError.h"
#include <fcntl.h>
#include <stdio.h>
#include <sys/time.h>
#include "IAndroidShm.h"
#include "shm.h"
#include "android/Shm.h" //android extension of shm.h
namespace Jack
{
pthread_mutex_t JackAndroidSemaphore::mutex = PTHREAD_MUTEX_INITIALIZER;
void JackAndroidSemaphore::BuildName(const char* client_name, const char* server_name, char* res, int size)
{
char ext_client_name[SYNC_MAX_NAME_SIZE + 1];
JackTools::RewriteName(client_name, ext_client_name);
if (getenv("JACK_PROMISCUOUS_SERVER")) {
snprintf(res, size, "jack_sem.%s_%s", server_name, ext_client_name);
} else {
snprintf(res, size, "jack_sem.%d_%s_%s", JackTools::GetUID(), server_name, ext_client_name);
}
}
bool JackAndroidSemaphore::Signal()
{
int res;
if (!fSemaphore) {
jack_error("JackAndroidSemaphore::Signal name = %s already deallocated!!", fName);
return false;
}
if (fFlush)
return true;
if ((res = sem_post(fSemaphore)) != 0) {
jack_error("JackAndroidSemaphore::Signal name = %s err = %s", fName, strerror(errno));
}
return (res == 0);
}
bool JackAndroidSemaphore::SignalAll()
{
int res;
if (!fSemaphore) {
jack_error("JackAndroidSemaphore::SignalAll name = %s already deallocated!!", fName);
return false;
}
if (fFlush)
return true;
if ((res = sem_post(fSemaphore)) != 0) {
jack_error("JackAndroidSemaphore::SignalAll name = %s err = %s", fName, strerror(errno));
}
return (res == 0);
}
/*
bool JackAndroidSemaphore::Wait()
{
int res;
if (!fSemaphore) {
jack_error("JackAndroidSemaphore::Wait name = %s already deallocated!!", fName);
return false;
}
if ((res = sem_wait(fSemaphore)) != 0) {
jack_error("JackAndroidSemaphore::Wait name = %s err = %s", fName, strerror(errno));
}
return (res == 0);
}
*/
bool JackAndroidSemaphore::Wait()
{
int res;
while ((res = sem_wait(fSemaphore) < 0)) {
jack_error("JackAndroidSemaphore::Wait name = %s err = %s", fName, strerror(errno));
if (errno != EINTR) {
break;
}
}
return (res == 0);
}
bool JackAndroidSemaphore::TimedWait(long usec)
{
int res;
struct timeval now;
timespec time;
if (!fSemaphore) {
jack_error("JackAndroidSemaphore::TimedWait name = %s already deallocated!!", fName);
return false;
}
gettimeofday(&now, 0);
time.tv_sec = now.tv_sec + usec / 1000000;
long tv_usec = (now.tv_usec + (usec % 1000000));
time.tv_sec += tv_usec / 1000000;
time.tv_nsec = (tv_usec % 1000000) * 1000;
while ((res = sem_timedwait(fSemaphore, &time)) < 0) {
jack_error("JackAndroidSemaphore::TimedWait err = %s", strerror(errno));
jack_log("JackAndroidSemaphore::TimedWait now : %ld %ld ", now.tv_sec, now.tv_usec);
jack_log("JackAndroidSemaphore::TimedWait next : %ld %ld ", time.tv_sec, time.tv_nsec/1000);
if (errno == ETIMEDOUT) {
timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
ts.tv_sec = time.tv_sec - ts.tv_sec;
ts.tv_nsec = time.tv_nsec - ts.tv_nsec;
if (ts.tv_nsec < 0) {
ts.tv_nsec += 1000000000;
ts.tv_sec -= 1;
}
if (ts.tv_sec < 0 || ts.tv_nsec < 0) {
jack_error("JackAndroidSemaphore::TimedWait time may changed or client killed already! wait again!");
gettimeofday(&now, 0);
time.tv_sec = now.tv_sec + usec / 1000000;
long tv_usec = (now.tv_usec + (usec % 1000000));
time.tv_sec += tv_usec / 1000000;
time.tv_nsec = (tv_usec % 1000000) * 1000;
if ((res = sem_timedwait(fSemaphore, &time)) < 0) {
jack_error("JackAndroidSemaphore::TimedWait err = %s", strerror(errno));
jack_log("JackAndroidSemaphore::TimedWait now : %ld %ld ", now.tv_sec, now.tv_usec);
jack_log("JackAndroidSemaphore::TimedWait next : %ld %ld ", time.tv_sec, time.tv_nsec/1000);
}
}
}
if (errno != EINTR) {
break;
}
}
return (res == 0);
}
// Server side : publish the semaphore in the global namespace
bool JackAndroidSemaphore::Allocate(const char* name, const char* server_name, int value)
{
pthread_mutex_lock (&mutex);
BuildName(name, server_name, fName, sizeof(fName));
jack_log("JackAndroidSemaphore::Allocate name = %s val = %ld", fName, value);
android::sp<android::IAndroidShm> service = android::Shm::getShmService();
if(service == NULL){
jack_error("shm service is null");
return false;
}
fSemaphoreMemory = service->InitSemaphore(fName);
if(fSemaphoreMemory != NULL){
fSemaphore = (sem_t*)(fSemaphoreMemory->getBase());
}
if(fSemaphore == NULL) {
jack_error("Allocate: can't check in named semaphore name = %s err = %s", fName, strerror(errno));
pthread_mutex_unlock (&mutex);
return false;
} else {
sem_init(fSemaphore, 1, 0);
jack_log("sem_init()");
pthread_mutex_unlock (&mutex);
return true;
}
}
// Client side : get the published semaphore from server
bool JackAndroidSemaphore::ConnectInput(const char* name, const char* server_name)
{
pthread_mutex_lock (&mutex);
BuildName(name, server_name, fName, sizeof(fName));
jack_log("JackAndroidSemaphore::Connect name = %s", fName);
// Temporary...
if (fSemaphore) {
jack_log("Already connected name = %s", name);
pthread_mutex_unlock (&mutex);
return true;
}
android::sp<android::IAndroidShm> service = android::Shm::getShmService();
if(service == NULL){
jack_error("shm service is null");
return false;
}
fSemaphoreMemory = service->InitSemaphore(fName);
if(fSemaphoreMemory != NULL){
fSemaphore = (sem_t*)(fSemaphoreMemory->getBase());
}
if(fSemaphore == NULL) {
jack_error("Connect: can't connect named semaphore name = %s err = %s", fName, strerror(errno));
pthread_mutex_unlock (&mutex);
return false;
} else {
int val = 0;
sem_getvalue(fSemaphore, &val);
jack_log("JackAndroidSemaphore::Connect sem_getvalue %ld", val);
pthread_mutex_unlock (&mutex);
return true;
}
}
bool JackAndroidSemaphore::Connect(const char* name, const char* server_name)
{
return ConnectInput(name, server_name);
}
bool JackAndroidSemaphore::ConnectOutput(const char* name, const char* server_name)
{
return ConnectInput(name, server_name);
}
bool JackAndroidSemaphore::Disconnect()
{
if (fSemaphore) {
jack_log("JackAndroidSemaphore::Disconnect name = %s", fName);
fSemaphore = NULL;
}
return true;
}
// Server side : destroy the semaphore
void JackAndroidSemaphore::Destroy()
{
if (fSemaphore != NULL) {
jack_log("JackAndroidSemaphore::Disconnect name = %s", fName);
fSemaphore = NULL;
} else {
jack_error("JackAndroidSemaphore::Destroy semaphore == NULL");
}
}
} // end of namespace
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