Sweden-Number/scheduler/timer.c

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1999-11-29 02:58:35 +01:00
/*
* Win32 waitable timers
*
* Copyright 1999 Alexandre Julliard
*/
#include <assert.h>
#include <string.h>
#include "winerror.h"
#include "file.h" /* for FILETIME routines */
#include "server.h"
/***********************************************************************
* CreateWaitableTimerA (KERNEL32.861)
*/
HANDLE WINAPI CreateWaitableTimerA( SECURITY_ATTRIBUTES *sa, BOOL manual, LPCSTR name )
{
struct create_timer_request *req = get_req_buffer();
req->manual = manual;
req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
server_strcpyAtoW( req->name, name );
SetLastError(0);
server_call( REQ_CREATE_TIMER );
if (req->handle == -1) return 0;
return req->handle;
}
/***********************************************************************
* CreateWaitableTimerW (KERNEL32.862)
*/
HANDLE WINAPI CreateWaitableTimerW( SECURITY_ATTRIBUTES *sa, BOOL manual, LPCWSTR name )
{
struct create_timer_request *req = get_req_buffer();
req->manual = manual;
req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
server_strcpyW( req->name, name );
SetLastError(0);
server_call( REQ_CREATE_TIMER );
if (req->handle == -1) return 0;
return req->handle;
}
/***********************************************************************
* OpenWaitableTimerA (KERNEL32.881)
*/
HANDLE WINAPI OpenWaitableTimerA( DWORD access, BOOL inherit, LPCSTR name )
{
struct open_timer_request *req = get_req_buffer();
req->access = access;
req->inherit = inherit;
server_strcpyAtoW( req->name, name );
server_call( REQ_OPEN_TIMER );
if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
return req->handle;
}
/***********************************************************************
* OpenWaitableTimerW (KERNEL32.882)
*/
HANDLE WINAPI OpenWaitableTimerW( DWORD access, BOOL inherit, LPCWSTR name )
{
struct open_timer_request *req = get_req_buffer();
req->access = access;
req->inherit = inherit;
server_strcpyW( req->name, name );
server_call( REQ_OPEN_TIMER );
if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
return req->handle;
}
/***********************************************************************
* SetWaitableTimer (KERNEL32.894)
*/
BOOL WINAPI SetWaitableTimer( HANDLE handle, const LARGE_INTEGER *when, LONG period,
PTIMERAPCROUTINE callback, LPVOID arg, BOOL resume )
{
FILETIME ft;
DWORD remainder;
struct set_timer_request *req = get_req_buffer();
if (when->s.HighPart < 0) /* relative time */
{
DWORD low;
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GetSystemTimeAsFileTime( &ft );
low = ft.dwLowDateTime;
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ft.dwLowDateTime -= when->s.LowPart;
ft.dwHighDateTime -= when->s.HighPart;
if (low < ft.dwLowDateTime) ft.dwHighDateTime--; /* overflow */
}
else /* absolute time */
{
ft.dwLowDateTime = when->s.LowPart;
ft.dwHighDateTime = when->s.HighPart;
}
if (!ft.dwLowDateTime && !ft.dwHighDateTime)
{
/* special case to start timeout on now+period without too many calculations */
req->sec = 0;
req->usec = 0;
}
else
{
req->sec = DOSFS_FileTimeToUnixTime( &ft, &remainder );
req->usec = remainder / 10; /* convert from 100-ns to us units */
}
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req->handle = handle;
req->period = period;
req->callback = callback;
req->arg = arg;
if (resume) SetLastError( ERROR_NOT_SUPPORTED ); /* set error but can still succeed */
return !server_call( REQ_SET_TIMER );
}
/***********************************************************************
* CancelWaitableTimer (KERNEL32.857)
*/
BOOL WINAPI CancelWaitableTimer( HANDLE handle )
{
struct cancel_timer_request *req = get_req_buffer();
req->handle = handle;
return !server_call( REQ_CANCEL_TIMER );
}