164 lines
4.1 KiB
C++
164 lines
4.1 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 "JackWinEvent.h"
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#include "JackTools.h"
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#include "JackError.h"
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#include <assert.h>
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// http://www.codeproject.com/win32/Win32_Event_Handling.asp
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// http://www.codeproject.com/threads/Synchronization.asp
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namespace Jack
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{
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void JackWinEvent::BuildName(const char* name, const char* server_name, char* res, int size)
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{
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snprintf(res, size, "jack_pipe.%s_%s", server_name, name);
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}
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bool JackWinEvent::Signal()
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{
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BOOL res;
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assert(fEvent);
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if (fFlush)
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return true;
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if (!(res = SetEvent(fEvent))) {
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jack_error("JackWinEvent::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 JackWinEvent::SignalAll()
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{
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BOOL res;
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assert(fEvent);
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if (fFlush)
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return true;
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if (!(res = SetEvent(fEvent))) {
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jack_error("JackWinEvent::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 JackWinEvent::Wait()
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{
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DWORD res;
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if ((res = WaitForSingleObject(fEvent, INFINITE)) == WAIT_TIMEOUT) {
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jack_error("JackWinEvent::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 JackWinEvent::TimedWait(long usec)
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{
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DWORD res;
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if ((res = WaitForSingleObject(fEvent, usec / 1000)) == WAIT_TIMEOUT) {
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jack_error("JackWinEvent::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 JackWinEvent::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("JackWinEvent::Connect %s", fName);
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// Temporary...
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if (fEvent) {
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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 ((fEvent = OpenEvent(EVENT_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 JackWinEvent::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 JackWinEvent::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 JackWinEvent::Disconnect()
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{
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if (fEvent) {
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jack_log("JackWinEvent::Disconnect %s", fName);
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CloseHandle(fEvent);
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fEvent = 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 JackWinEvent::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("JackWinEvent::Allocate name = %s val = %ld", fName, value);
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/* create an auto reset event */
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if ((fEvent = CreateEvent(NULL, FALSE, FALSE, fName)) == NULL) {
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jack_error("Allocate: can't check in named event 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 event already exist name = %s", fName);
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CloseHandle(fEvent);
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fEvent = NULL;
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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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void JackWinEvent::Destroy()
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{
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if (fEvent != NULL) {
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jack_log("JackWinEvent::Destroy %s", fName);
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CloseHandle(fEvent);
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fEvent = NULL;
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} else {
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jack_error("JackWinEvent::Destroy synchro == NULL");
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}
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}
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} // end of namespace
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