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