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/*
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 "JackWinEvent.h"
#include "JackTools.h"
#include "JackError.h"
#include <assert.h>
// http://www.codeproject.com/win32/Win32_Event_Handling.asp
// http://www.codeproject.com/threads/Synchronization.asp
namespace Jack
{
void JackWinEvent::BuildName(const char* name, const char* server_name, char* res, int size)
{
snprintf(res, size, "jack_pipe.%s_%s", server_name, name);
}
bool JackWinEvent::Signal()
{
BOOL res;
assert(fEvent);
if (fFlush)
return true;
if (!(res = SetEvent(fEvent))) {
jack_error("JackWinEvent::Signal name = %s err = %ld", fName, GetLastError());
}
return res;
}
bool JackWinEvent::SignalAll()
{
BOOL res;
assert(fEvent);
if (fFlush)
return true;
if (!(res = SetEvent(fEvent))) {
jack_error("JackWinEvent::SignalAll name = %s err = %ld", fName, GetLastError());
}
return res;
}
bool JackWinEvent::Wait()
{
DWORD res;
if ((res = WaitForSingleObject(fEvent, INFINITE)) == WAIT_TIMEOUT) {
jack_error("JackWinEvent::TimedWait name = %s time_out", fName);
}
return (res == WAIT_OBJECT_0);
}
bool JackWinEvent::TimedWait(long usec)
{
DWORD res;
if ((res = WaitForSingleObject(fEvent, usec / 1000)) == WAIT_TIMEOUT) {
jack_error("JackWinEvent::TimedWait name = %s time_out", fName);
}
return (res == WAIT_OBJECT_0);
}
// Client side : get the published semaphore from server
bool JackWinEvent::ConnectInput(const char* name, const char* server_name)
{
BuildName(name, server_name, fName, sizeof(fName));
jack_log("JackWinEvent::Connect %s", fName);
// Temporary...
if (fEvent) {
jack_log("Already connected name = %s", name);
return true;
}
if ((fEvent = OpenEvent(EVENT_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 JackWinEvent::Connect(const char* name, const char* server_name)
{
return ConnectInput(name, server_name);
}
bool JackWinEvent::ConnectOutput(const char* name, const char* server_name)
{
return ConnectInput(name, server_name);
}
bool JackWinEvent::Disconnect()
{
if (fEvent) {
jack_log("JackWinEvent::Disconnect %s", fName);
CloseHandle(fEvent);
fEvent = NULL;
return true;
} else {
return false;
}
}
bool JackWinEvent::Allocate(const char* name, const char* server_name, int value)
{
BuildName(name, server_name, fName, sizeof(fName));
jack_log("JackWinEvent::Allocate name = %s val = %ld", fName, value);
/* create an auto reset event */
if ((fEvent = CreateEvent(NULL, FALSE, FALSE, fName)) == NULL) {
jack_error("Allocate: can't check in named event name = %s err = %ld", fName, GetLastError());
return false;
} else if (GetLastError() == ERROR_ALREADY_EXISTS) {
jack_error("Allocate: named event already exist name = %s", fName);
CloseHandle(fEvent);
fEvent = NULL;
return false;
} else {
return true;
}
}
void JackWinEvent::Destroy()
{
if (fEvent != NULL) {
jack_log("JackWinEvent::Destroy %s", fName);
CloseHandle(fEvent);
fEvent = NULL;
} else {
jack_error("JackWinEvent::Destroy synchro == NULL");
}
}
} // end of namespace
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