diff --git a/scheduler/timer.c b/scheduler/timer.c
new file mode 100644
index 0000000..0054187
--- /dev/null
+++ b/scheduler/timer.c
@@ -0,0 +1,122 @@
+/*
+ * 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 = ft.dwLowDateTime;
+        GetSystemTimeAsFileTime( &ft );
+        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;
+    }
+    req->handle   = handle;
+    req->sec      = DOSFS_FileTimeToUnixTime( &ft, &remainder );
+    req->usec     = remainder / 10;  /* convert from 100-ns to us units */
+    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 );
+}