jack2/android/JackAndroidSemaphore.cpp at develop · jackaudio/jack2 · GitHub

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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

jack2/android/JackAndroidSemaphore.cpp at develop · jackaudio/jack2 · GitHub

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