mirror of
https://github.com/reactos/reactos.git
synced 2024-11-10 00:34:39 +00:00
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
|
|
* PROJECT: ReactOS
|
|
* LICENSE: GPL - See COPYING in the top level directory
|
|
* PURPOSE: Audio Service Plug and Play list locking mechanism
|
|
* COPYRIGHT: Copyright 2007 Andrew Greenwood
|
|
*/
|
|
|
|
#include "audiosrv.h"
|
|
|
|
#include <assert.h>
|
|
|
|
static HANDLE audio_device_list_lock = NULL;
|
|
|
|
BOOL
|
|
InitializeAudioDeviceListLock(VOID)
|
|
{
|
|
/* The security stuff is to make sure the mutex can be grabbed by
|
|
other processes - is this the best idea though ??? */
|
|
|
|
SECURITY_DESCRIPTOR security_descriptor;
|
|
SECURITY_ATTRIBUTES security;
|
|
|
|
InitializeSecurityDescriptor(&security_descriptor, SECURITY_DESCRIPTOR_REVISION);
|
|
SetSecurityDescriptorDacl(&security_descriptor, TRUE, 0, FALSE);
|
|
|
|
security.nLength = sizeof(SECURITY_ATTRIBUTES);
|
|
security.lpSecurityDescriptor = &security_descriptor;
|
|
security.bInheritHandle = FALSE;
|
|
|
|
audio_device_list_lock = CreateMutex(&security,
|
|
FALSE,
|
|
AUDIO_LIST_LOCK_NAME);
|
|
|
|
return (audio_device_list_lock != NULL);
|
|
}
|
|
|
|
VOID
|
|
KillAudioDeviceListLock(VOID)
|
|
{
|
|
CloseHandle(audio_device_list_lock);
|
|
audio_device_list_lock = NULL;
|
|
}
|
|
|
|
VOID
|
|
LockAudioDeviceList(VOID)
|
|
{
|
|
assert(audio_device_list_lock != NULL);
|
|
WaitForSingleObject(audio_device_list_lock, INFINITE);
|
|
}
|
|
|
|
VOID
|
|
UnlockAudioDeviceList(VOID)
|
|
{
|
|
assert(audio_device_list_lock != NULL);
|
|
ReleaseMutex(audio_device_list_lock);
|
|
}
|