JackWinSemaphore.cpp
/*
Copyright (C) 2004-2008 Grame
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 "JackWinSemaphore.h"
#include "JackConstants.h"
#include "JackTools.h"
#include "JackError.h"
#include <stdio.h>
namespace Jack
{
void JackWinSemaphore::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);
_snprintf(res, size, "jack_pipe.%s_%s", server_name, ext_client_name);
}
bool JackWinSemaphore::Signal()
{
BOOL res;
assert(fSemaphore);
if (fFlush) {
return true;
}
if (!(res = ReleaseSemaphore(fSemaphore, 1, NULL))) {
jack_error("JackWinSemaphore::Signal name = %s err = %ld", fName, GetLastError());
}
return res;
}
bool JackWinSemaphore::SignalAll()
{
BOOL res;
assert(fSemaphore);
if (fFlush) {
return true;
}
if (!(res = ReleaseSemaphore(fSemaphore, 1, NULL))) {
jack_error("JackWinSemaphore::SignalAll name = %s err = %ld", fName, GetLastError());
}
return res;
}
bool JackWinSemaphore::Wait()
{
DWORD res;
if ((res = WaitForSingleObject(fSemaphore, INFINITE)) == WAIT_TIMEOUT) {
jack_error("JackWinSemaphore::TimedWait name = %s time_out", fName);
}
return (res == WAIT_OBJECT_0);
}
bool JackWinSemaphore::TimedWait(long usec)
{
DWORD res;
if ((res = WaitForSingleObject(fSemaphore, usec / 1000)) == WAIT_TIMEOUT) {
jack_error("JackWinSemaphore::TimedWait name = %s time_out", fName);
}
return (res == WAIT_OBJECT_0);
}
// Client side : get the published semaphore from server
bool JackWinSemaphore::ConnectInput(const char* name, const char* server_name)
{
BuildName(name, server_name, fName, sizeof(fName));
jack_log("JackWinSemaphore::Connect %s", fName);
// Temporary...
if (fSemaphore) {
jack_log("Already connected name = %s", name);
return true;
}
if ((fSemaphore = OpenSemaphore(SEMAPHORE_ALL_ACCESS , FALSE, fName)) == NULL) {
jack_error("Connect: can't check in named event name = %s err = %ld", fName, GetLastError());
return false;
} else {
return true;
}
}
bool JackWinSemaphore::Connect(const char* name, const char* server_name)
{
return ConnectInput(name, server_name);
}
bool JackWinSemaphore::ConnectOutput(const char* name, const char* server_name)
{
return ConnectInput(name, server_name);
}
bool JackWinSemaphore::Disconnect()
{
if (fSemaphore) {
jack_log("JackWinSemaphore::Disconnect %s", fName);
CloseHandle(fSemaphore);
fSemaphore = NULL;
return true;
} else {
return false;
}
}
bool JackWinSemaphore::Allocate(const char* name, const char* server_name, int value)
{
BuildName(name, server_name, fName, sizeof(fName));
jack_log("JackWinSemaphore::Allocate name = %s val = %ld", fName, value);
if ((fSemaphore = CreateSemaphore(NULL, value, 32767, fName)) == NULL) {
jack_error("Allocate: can't check in named semaphore name = %s err = %ld", fName, GetLastError());
return false;
} else if (GetLastError() == ERROR_ALREADY_EXISTS) {
jack_error("Allocate: named semaphore already exist name = %s", fName);
// Try to open it
fSemaphore = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, fName);
return (fSemaphore != NULL);
} else {
return true;
}
}
void JackWinSemaphore::Destroy()
{
if (fSemaphore != NULL) {
jack_log("JackWinSemaphore::Destroy %s", fName);
CloseHandle(fSemaphore);
fSemaphore = NULL;
} else {
jack_error("JackWinSemaphore::Destroy synchro == NULL");
}
}
} // end of namespace
Jack
Definition: JackAC3Encoder.cpp:30
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
jack_log
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:108