Moved WaitForMultipleObjects to ntdll (based on a patch by Eric

Pouech).
Added NTDLL_get_server_timeout function to compute ntdll-style
timeouts and adapted the timer code to use it.
This commit is contained in:
Alexandre Julliard 2003-03-31 01:37:04 +00:00
parent 43bfe7f2d0
commit fbef57c0ce
8 changed files with 265 additions and 238 deletions

View File

@ -249,7 +249,7 @@
@ stdcall NtUnmapViewOfSection(long ptr) @ stdcall NtUnmapViewOfSection(long ptr)
@ stub NtVdmControl @ stub NtVdmControl
@ stub NtW32Call @ stub NtW32Call
@ stub NtWaitForMultipleObjects @ stdcall NtWaitForMultipleObjects(long ptr long long ptr)
@ stub NtWaitForProcessMutant @ stub NtWaitForProcessMutant
@ stdcall NtWaitForSingleObject(long long long) @ stdcall NtWaitForSingleObject(long long long)
@ stub NtWaitHighEventPair @ stub NtWaitHighEventPair
@ -773,7 +773,7 @@
@ stdcall ZwUnmapViewOfSection(long ptr) NtUnmapViewOfSection @ stdcall ZwUnmapViewOfSection(long ptr) NtUnmapViewOfSection
@ stub ZwVdmControl @ stub ZwVdmControl
@ stub ZwW32Call @ stub ZwW32Call
@ stub ZwWaitForMultipleObjects @ stdcall ZwWaitForMultipleObjects(long ptr long long ptr) NtWaitForMultipleObjects
@ stub ZwWaitForProcessMutant @ stub ZwWaitForProcessMutant
@ stdcall ZwWaitForSingleObject(long long long) NtWaitForSingleObject @ stdcall ZwWaitForSingleObject(long long long) NtWaitForSingleObject
@ stub ZwWaitHighEventPair @ stub ZwWaitHighEventPair

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@ -28,6 +28,8 @@
extern LPCSTR debugstr_us( const UNICODE_STRING *str ); extern LPCSTR debugstr_us( const UNICODE_STRING *str );
extern void dump_ObjectAttributes (const OBJECT_ATTRIBUTES *ObjectAttributes); extern void dump_ObjectAttributes (const OBJECT_ATTRIBUTES *ObjectAttributes);
extern void NTDLL_get_server_timeout( struct timeval *when, const LARGE_INTEGER *timeout );
/* module handling */ /* module handling */
extern FARPROC MODULE_GetProcAddress( HMODULE hModule, LPCSTR function, int hint, BOOL snoop ); extern FARPROC MODULE_GetProcAddress( HMODULE hModule, LPCSTR function, int hint, BOOL snoop );
extern WINE_MODREF *MODULE_AllocModRef( HMODULE hModule, LPCSTR filename ); extern WINE_MODREF *MODULE_AllocModRef( HMODULE hModule, LPCSTR filename );

View File

@ -268,19 +268,6 @@ NTSTATUS WINAPI NtClose( HANDLE Handle )
return ret; return ret;
} }
/******************************************************************************
* NtWaitForSingleObject [NTDLL.@]
* ZwWaitForSingleObject [NTDLL.@]
*/
NTSTATUS WINAPI NtWaitForSingleObject(
IN HANDLE Object,
IN BOOLEAN Alertable,
IN PLARGE_INTEGER Time)
{
FIXME("(%p,0x%08x,%p),stub!\n",Object,Alertable,Time);
return 0;
}
/* /*
* Directory functions * Directory functions
*/ */

View File

@ -1,6 +1,7 @@
/* /*
* Process synchronisation * Process synchronisation
* *
* Copyright 1997 Alexandre Julliard
* Copyright 1999, 2000 Juergen Schmied * Copyright 1999, 2000 Juergen Schmied
* *
* This library is free software; you can redistribute it and/or * This library is free software; you can redistribute it and/or
@ -18,16 +19,31 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/ */
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <signal.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_POLL_H
# include <sys/poll.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#include <time.h> #include <time.h>
#include "wine/debug.h"
#include "winerror.h"
#include "wine/unicode.h"
#include "wine/server.h"
#include "winternl.h" #include "winternl.h"
#include "async.h"
#include "thread.h"
#include "wine/server.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "ntdll_misc.h" #include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(ntdll); WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
@ -261,3 +277,174 @@ NTSTATUS WINAPI NtQueryEvent (
FIXME("(%p)\n", EventHandle); FIXME("(%p)\n", EventHandle);
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }
/***********************************************************************
* check_async_list
*
* Process a status event from the server.
*/
static void WINAPI check_async_list(async_private *asp, DWORD status)
{
async_private *ovp;
DWORD ovp_status;
for( ovp = NtCurrentTeb()->pending_list; ovp && ovp != asp; ovp = ovp->next );
if(!ovp)
return;
if( status != STATUS_ALERTED )
{
ovp_status = status;
ovp->ops->set_status (ovp, status);
}
else ovp_status = ovp->ops->get_status (ovp);
if( ovp_status == STATUS_PENDING ) ovp->func( ovp );
/* This will destroy all but PENDING requests */
register_old_async( ovp );
}
/***********************************************************************
* wait_reply
*
* Wait for a reply on the waiting pipe of the current thread.
*/
static int wait_reply( void *cookie )
{
int signaled;
struct wake_up_reply reply;
for (;;)
{
int ret;
ret = read( NtCurrentTeb()->wait_fd[0], &reply, sizeof(reply) );
if (ret == sizeof(reply))
{
if (!reply.cookie) break; /* thread got killed */
if (reply.cookie == cookie) return reply.signaled;
/* we stole another reply, wait for the real one */
signaled = wait_reply( cookie );
/* and now put the wrong one back in the pipe */
for (;;)
{
ret = write( NtCurrentTeb()->wait_fd[1], &reply, sizeof(reply) );
if (ret == sizeof(reply)) break;
if (ret >= 0) server_protocol_error( "partial wakeup write %d\n", ret );
if (errno == EINTR) continue;
server_protocol_perror("wakeup write");
}
return signaled;
}
if (ret >= 0) server_protocol_error( "partial wakeup read %d\n", ret );
if (errno == EINTR) continue;
server_protocol_perror("wakeup read");
}
/* the server closed the connection; time to die... */
SYSDEPS_AbortThread(0);
}
/***********************************************************************
* call_apcs
*
* Call outstanding APCs.
*/
static void call_apcs( BOOL alertable )
{
FARPROC proc = NULL;
LARGE_INTEGER time;
void *args[4];
for (;;)
{
int type = APC_NONE;
SERVER_START_REQ( get_apc )
{
req->alertable = alertable;
wine_server_set_reply( req, args, sizeof(args) );
if (!wine_server_call( req ))
{
type = reply->type;
proc = reply->func;
}
}
SERVER_END_REQ;
switch(type)
{
case APC_NONE:
return; /* no more APCs */
case APC_ASYNC:
proc( args[0], args[1]);
break;
case APC_USER:
proc( args[0] );
break;
case APC_TIMER:
/* convert sec/usec to NT time */
RtlSecondsSince1970ToTime( (time_t)args[0], &time );
time.QuadPart += (DWORD)args[1] * 10;
proc( args[2], time.s.LowPart, time.s.HighPart );
break;
case APC_ASYNC_IO:
check_async_list ( args[0], (DWORD) args[1]);
break;
default:
server_protocol_error( "get_apc_request: bad type %d\n", type );
break;
}
}
}
/* wait operations */
/******************************************************************
* NtWaitForMultipleObjects (NTDLL.@)
*/
NTSTATUS WINAPI NtWaitForMultipleObjects( DWORD count, const HANDLE *handles,
BOOLEAN wait_all, BOOLEAN alertable,
PLARGE_INTEGER timeout )
{
int ret, cookie;
struct timeval tv;
if (count > MAXIMUM_WAIT_OBJECTS) return STATUS_INVALID_PARAMETER_1;
NTDLL_get_server_timeout( &tv, timeout );
for (;;)
{
SERVER_START_REQ( select )
{
req->flags = SELECT_INTERRUPTIBLE;
req->cookie = &cookie;
req->sec = tv.tv_sec;
req->usec = tv.tv_usec;
wine_server_add_data( req, handles, count * sizeof(HANDLE) );
if (wait_all) req->flags |= SELECT_ALL;
if (alertable) req->flags |= SELECT_ALERTABLE;
if (timeout) req->flags |= SELECT_TIMEOUT;
ret = wine_server_call( req );
}
SERVER_END_REQ;
if (ret == STATUS_PENDING) ret = wait_reply( &cookie );
if (ret != STATUS_USER_APC) break;
call_apcs( alertable );
if (alertable) break;
}
return ret;
}
/******************************************************************
* NtWaitForSingleObject (NTDLL.@)
*/
NTSTATUS WINAPI NtWaitForSingleObject(HANDLE handle, BOOLEAN alertable, PLARGE_INTEGER timeout )
{
return NtWaitForMultipleObjects( 1, &handle, FALSE, alertable, timeout );
}

View File

@ -269,9 +269,11 @@ static const struct tagTZ_INFO TZ_INFO[] =
#define MONSPERYEAR 12 #define MONSPERYEAR 12
/* 1601 to 1970 is 369 years plus 89 leap days */ /* 1601 to 1970 is 369 years plus 89 leap days */
#define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)86400) #define SECS_1601_TO_1970 ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
#define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
/* 1601 to 1980 is 379 years plus 91 leap days */ /* 1601 to 1980 is 379 years plus 91 leap days */
#define SECS_1601_to_1980 ((379 * 365 + 91) * (ULONGLONG)86400) #define SECS_1601_TO_1980 ((379 * 365 + 91) * (ULONGLONG)SECSPERDAY)
#define TICKS_1601_TO_1980 (SECS_1601_TO_1980 * TICKSPERSEC)
static const int YearLengths[2] = {DAYSPERNORMALYEAR, DAYSPERLEAPYEAR}; static const int YearLengths[2] = {DAYSPERNORMALYEAR, DAYSPERLEAPYEAR};
@ -292,6 +294,39 @@ static inline void NormalizeTimeFields(CSHORT *FieldToNormalize, CSHORT *CarryFi
*CarryField = (CSHORT) (*CarryField + 1); *CarryField = (CSHORT) (*CarryField + 1);
} }
/***********************************************************************
* NTDLL_get_server_timeout
*
* Convert a NTDLL timeout into a timeval struct to send to the server.
*/
void NTDLL_get_server_timeout( struct timeval *when, const LARGE_INTEGER *timeout )
{
UINT remainder;
if (!timeout) /* infinite timeout */
{
when->tv_sec = when->tv_usec = 0;
}
else if (timeout->QuadPart <= 0) /* relative timeout */
{
ULONG sec = RtlEnlargedUnsignedDivide( -timeout->QuadPart, TICKSPERSEC, &remainder );
gettimeofday( when, 0 );
if ((when->tv_usec += remainder / 10) >= 1000000)
{
when->tv_usec -= 1000000;
when->tv_sec++;
}
when->tv_sec += sec;
}
else /* absolute time */
{
when->tv_sec = RtlEnlargedUnsignedDivide( timeout->QuadPart - TICKS_1601_TO_1970,
TICKSPERSEC, &remainder );
when->tv_usec = remainder / 10;
}
}
/****************************************************************************** /******************************************************************************
* RtlTimeToTimeFields [NTDLL.@] * RtlTimeToTimeFields [NTDLL.@]
* *
@ -501,7 +536,7 @@ BOOLEAN WINAPI RtlTimeToSecondsSince1980( const LARGE_INTEGER *time, LPDWORD res
{ {
ULONGLONG tmp = ((ULONGLONG)time->s.HighPart << 32) | time->s.LowPart; ULONGLONG tmp = ((ULONGLONG)time->s.HighPart << 32) | time->s.LowPart;
tmp = RtlLargeIntegerDivide( tmp, 10000000, NULL ); tmp = RtlLargeIntegerDivide( tmp, 10000000, NULL );
tmp -= SECS_1601_to_1980; tmp -= SECS_1601_TO_1980;
if (tmp > 0xffffffff) return FALSE; if (tmp > 0xffffffff) return FALSE;
*res = (DWORD)tmp; *res = (DWORD)tmp;
return TRUE; return TRUE;
@ -521,7 +556,7 @@ BOOLEAN WINAPI RtlTimeToSecondsSince1980( const LARGE_INTEGER *time, LPDWORD res
*/ */
void WINAPI RtlSecondsSince1970ToTime( DWORD time, LARGE_INTEGER *res ) void WINAPI RtlSecondsSince1970ToTime( DWORD time, LARGE_INTEGER *res )
{ {
ULONGLONG secs = RtlExtendedIntegerMultiply( time + SECS_1601_TO_1970, 10000000 ); ULONGLONG secs = time * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
res->s.LowPart = (DWORD)secs; res->s.LowPart = (DWORD)secs;
res->s.HighPart = (DWORD)(secs >> 32); res->s.HighPart = (DWORD)(secs >> 32);
} }
@ -540,7 +575,7 @@ void WINAPI RtlSecondsSince1970ToTime( DWORD time, LARGE_INTEGER *res )
*/ */
void WINAPI RtlSecondsSince1980ToTime( DWORD time, LARGE_INTEGER *res ) void WINAPI RtlSecondsSince1980ToTime( DWORD time, LARGE_INTEGER *res )
{ {
ULONGLONG secs = RtlExtendedIntegerMultiply( time + SECS_1601_to_1980, 10000000 ); ULONGLONG secs = time * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1980;
res->s.LowPart = (DWORD)secs; res->s.LowPart = (DWORD)secs;
res->s.HighPart = (DWORD)(secs >> 32); res->s.HighPart = (DWORD)(secs >> 32);
} }
@ -588,7 +623,8 @@ NTSTATUS WINAPI NtQuerySystemTime( PLARGE_INTEGER time )
struct timeval now; struct timeval now;
gettimeofday( &now, 0 ); gettimeofday( &now, 0 );
time->QuadPart = RtlExtendedIntegerMultiply( now.tv_sec+SECS_1601_TO_1970, 10000000 ) + now.tv_usec * 10; time->QuadPart = now.tv_sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
time->QuadPart += now.tv_usec * 10;
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }

View File

@ -872,6 +872,7 @@ NTSTATUS WINAPI NtUnloadKey(HKEY);
NTSTATUS WINAPI NtUnlockVirtualMemory(HANDLE,PVOID*,ULONG*,ULONG); NTSTATUS WINAPI NtUnlockVirtualMemory(HANDLE,PVOID*,ULONG*,ULONG);
NTSTATUS WINAPI NtUnmapViewOfSection(HANDLE,PVOID); NTSTATUS WINAPI NtUnmapViewOfSection(HANDLE,PVOID);
NTSTATUS WINAPI NtWaitForSingleObject(HANDLE,BOOLEAN,PLARGE_INTEGER); NTSTATUS WINAPI NtWaitForSingleObject(HANDLE,BOOLEAN,PLARGE_INTEGER);
NTSTATUS WINAPI NtWaitForMultipleObjects(ULONG,const HANDLE*,BOOLEAN,BOOLEAN,PLARGE_INTEGER);
void WINAPI RtlAcquirePebLock(void); void WINAPI RtlAcquirePebLock(void);
BYTE WINAPI RtlAcquireResourceExclusive(LPRTL_RWLOCK,BYTE); BYTE WINAPI RtlAcquireResourceExclusive(LPRTL_RWLOCK,BYTE);

View File

@ -20,163 +20,9 @@
#include "config.h" #include "config.h"
#include <assert.h> #include "winbase.h"
#include <errno.h> #include "winternl.h"
#include <signal.h>
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_POLL_H
# include <sys/poll.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include "file.h" /* for DOSFS_UnixTimeToFileTime */
#include "thread.h"
#include "winerror.h"
#include "wine/server.h"
#include "async.h"
/***********************************************************************
* get_timeout
*/
inline static void get_timeout( struct timeval *when, int timeout )
{
gettimeofday( when, 0 );
if (timeout)
{
long sec = timeout / 1000;
if ((when->tv_usec += (timeout - 1000*sec) * 1000) >= 1000000)
{
when->tv_usec -= 1000000;
when->tv_sec++;
}
when->tv_sec += sec;
}
}
/***********************************************************************
* check_async_list
*
* Process a status event from the server.
*/
static void WINAPI check_async_list(async_private *asp, DWORD status)
{
async_private *ovp;
DWORD ovp_status;
for( ovp = NtCurrentTeb()->pending_list; ovp && ovp != asp; ovp = ovp->next );
if(!ovp)
return;
if( status != STATUS_ALERTED )
{
ovp_status = status;
ovp->ops->set_status (ovp, status);
}
else ovp_status = ovp->ops->get_status (ovp);
if( ovp_status == STATUS_PENDING ) ovp->func( ovp );
/* This will destroy all but PENDING requests */
register_old_async( ovp );
}
/***********************************************************************
* wait_reply
*
* Wait for a reply on the waiting pipe of the current thread.
*/
static int wait_reply( void *cookie )
{
int signaled;
struct wake_up_reply reply;
for (;;)
{
int ret;
ret = read( NtCurrentTeb()->wait_fd[0], &reply, sizeof(reply) );
if (ret == sizeof(reply))
{
if (!reply.cookie) break; /* thread got killed */
if (reply.cookie == cookie) return reply.signaled;
/* we stole another reply, wait for the real one */
signaled = wait_reply( cookie );
/* and now put the wrong one back in the pipe */
for (;;)
{
ret = write( NtCurrentTeb()->wait_fd[1], &reply, sizeof(reply) );
if (ret == sizeof(reply)) break;
if (ret >= 0) server_protocol_error( "partial wakeup write %d\n", ret );
if (errno == EINTR) continue;
server_protocol_perror("wakeup write");
}
return signaled;
}
if (ret >= 0) server_protocol_error( "partial wakeup read %d\n", ret );
if (errno == EINTR) continue;
server_protocol_perror("wakeup read");
}
/* the server closed the connection; time to die... */
SYSDEPS_AbortThread(0);
}
/***********************************************************************
* call_apcs
*
* Call outstanding APCs.
*/
static void call_apcs( BOOL alertable )
{
FARPROC proc = NULL;
FILETIME ft;
void *args[4];
for (;;)
{
int type = APC_NONE;
SERVER_START_REQ( get_apc )
{
req->alertable = alertable;
wine_server_set_reply( req, args, sizeof(args) );
if (!wine_server_call( req ))
{
type = reply->type;
proc = reply->func;
}
}
SERVER_END_REQ;
switch(type)
{
case APC_NONE:
return; /* no more APCs */
case APC_ASYNC:
proc( args[0], args[1]);
break;
case APC_USER:
proc( args[0] );
break;
case APC_TIMER:
/* convert sec/usec to NT time */
DOSFS_UnixTimeToFileTime( (time_t)args[0], &ft, (DWORD)args[1] * 10 );
proc( args[2], ft.dwLowDateTime, ft.dwHighDateTime );
break;
case APC_ASYNC_IO:
check_async_list ( args[0], (DWORD) args[1]);
break;
default:
server_protocol_error( "get_apc_request: bad type %d\n", type );
break;
}
}
}
/*********************************************************************** /***********************************************************************
* Sleep (KERNEL32.@) * Sleep (KERNEL32.@)
@ -233,46 +79,27 @@ DWORD WINAPI WaitForMultipleObjectsEx( DWORD count, const HANDLE *handles,
BOOL wait_all, DWORD timeout, BOOL wait_all, DWORD timeout,
BOOL alertable ) BOOL alertable )
{ {
int ret, cookie; NTSTATUS status;
struct timeval tv;
if (count > MAXIMUM_WAIT_OBJECTS) if (timeout == INFINITE)
{ {
SetLastError( ERROR_INVALID_PARAMETER ); status = NtWaitForMultipleObjects( count, handles, wait_all, alertable, NULL );
return WAIT_FAILED; }
else
{
LARGE_INTEGER time;
time.QuadPart = timeout * (ULONGLONG)10000;
time.QuadPart = -time.QuadPart;
status = NtWaitForMultipleObjects( count, handles, wait_all, alertable, &time );
} }
if (timeout == INFINITE) tv.tv_sec = tv.tv_usec = 0; if (HIWORD(status)) /* is it an error code? */
else get_timeout( &tv, timeout );
for (;;)
{ {
SERVER_START_REQ( select ) SetLastError( RtlNtStatusToDosError(status) );
{ status = WAIT_FAILED;
req->flags = SELECT_INTERRUPTIBLE;
req->cookie = &cookie;
req->sec = tv.tv_sec;
req->usec = tv.tv_usec;
wine_server_add_data( req, handles, count * sizeof(HANDLE) );
if (wait_all) req->flags |= SELECT_ALL;
if (alertable) req->flags |= SELECT_ALERTABLE;
if (timeout != INFINITE) req->flags |= SELECT_TIMEOUT;
ret = wine_server_call( req );
}
SERVER_END_REQ;
if (ret == STATUS_PENDING) ret = wait_reply( &cookie );
if (ret != STATUS_USER_APC) break;
call_apcs( alertable );
if (alertable) break;
} }
if (HIWORD(ret)) /* is it an error code? */ return status;
{
SetLastError( RtlNtStatusToDosError(ret) );
ret = WAIT_FAILED;
}
return ret;
} }

View File

@ -29,9 +29,9 @@
#include "winerror.h" #include "winerror.h"
#include "winnls.h" #include "winnls.h"
#include "wine/unicode.h" #include "wine/unicode.h"
#include "file.h" /* for FILETIME routines */
#include "wine/server.h" #include "wine/server.h"
#include "wine/debug.h" #include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(timer); WINE_DEFAULT_DEBUG_CHANNEL(timer);
@ -130,34 +130,21 @@ BOOL WINAPI SetWaitableTimer( HANDLE handle, const LARGE_INTEGER *when, LONG per
PTIMERAPCROUTINE callback, LPVOID arg, BOOL resume ) PTIMERAPCROUTINE callback, LPVOID arg, BOOL resume )
{ {
BOOL ret; BOOL ret;
LARGE_INTEGER exp = *when; struct timeval tv;
if (exp.s.HighPart < 0) /* relative time */ if (!when->s.LowPart && !when->s.HighPart)
{ {
LARGE_INTEGER now; /* special case to start timeout on now+period without too many calculations */
NtQuerySystemTime( &now ); tv.tv_sec = 0;
exp.QuadPart = RtlLargeIntegerSubtract( now.QuadPart, exp.QuadPart ); tv.tv_usec = 0;
} }
else NTDLL_get_server_timeout( &tv, when );
SERVER_START_REQ( set_timer ) SERVER_START_REQ( set_timer )
{ {
if (!exp.s.LowPart && !exp.s.HighPart)
{
/* special case to start timeout on now+period without too many calculations */
req->sec = 0;
req->usec = 0;
}
else
{
DWORD remainder;
FILETIME ft;
ft.dwLowDateTime = exp.s.LowPart;
ft.dwHighDateTime = exp.s.HighPart;
req->sec = DOSFS_FileTimeToUnixTime( &ft, &remainder );
req->usec = remainder / 10; /* convert from 100-ns to us units */
}
req->handle = handle; req->handle = handle;
req->sec = tv.tv_sec;
req->usec = tv.tv_usec;
req->period = period; req->period = period;
req->callback = callback; req->callback = callback;
req->arg = arg; req->arg = arg;