apps/tests/eventpair/eventpair.c

   1 /*
   2  * Author: Skywing (skywing@valhallalegends.com)
   3  * Date: 09/09/2003
   4  * Purpose: Test Thread-EventPair functionality.
   5  */
   6
   7 #include <windows.h>
   8 #include <stdio.h>
   9 #include <ddk/ntddk.h>
  10
  11 #ifndef NTAPI
  12 #define NTAPI WINAPI
  13 #endif
  14
  15 HANDLE MakeEventPair()
  16 {
  17         NTSTATUS Status;
  18         HANDLE EventPair;
  19         OBJECT_ATTRIBUTES Attributes;
  20
  21         InitializeObjectAttributes(&Attributes, NULL, 0, NULL, NULL);
  22         Status = NtCreateEventPair(&EventPair, STANDARD_RIGHTS_ALL, &Attributes);
  23         printf("Status %08x creating eventpair\n", Status);
  24         return EventPair;
  25 }
  26
  27 DWORD __stdcall threadfunc(void* eventpair)
  28 {
  29         printf("Thread: Set eventpair status %08x\n", NtSetInformationThread(NtCurrentThread(), ThreadEventPair, &eventpair, sizeof(HANDLE)));
  30         Sleep(2500);
  31
  32         printf("Thread: Setting low and waiting high...\n");
  33         printf("Thread: status = %08x\n", NtSetLowWaitHighThread());
  34         printf("Thread: status = %08x\n", NtSetHighWaitLowThread());
  35         printf("Thread: Terminating...\n");
  36         return 0;
  37 }
  38
  39 int main(int ac, char **av)
  40 {
  41         DWORD id;
  42         HANDLE EventPair, Thread;
  43
  44         printf("Main: NtSetLowWaitHighThread is at %08x\n", NtSetLowWaitHighThread);
  45
  46         EventPair = MakeEventPair();
  47
  48         if(!EventPair) {
  49                 printf("Main: Could not create event pair.\n");
  50                 return 0;
  51         }
  52
  53         printf("Main: EventPair = %08x\n", EventPair);
  54         Thread = CreateThread(0, 0, threadfunc, EventPair, 0, &id);
  55         printf("Main: ThreadId for new thread is %08x\n", id);
  56         printf("Main: Setting high and waiting low\n");
  57         printf("Main: status = %08x\n", NtSetHighWaitLowEventPair(EventPair));
  58         Sleep(2500);
  59         printf("Main: status = %08x\n", NtSetLowWaitHighEventPair(EventPair));
  60         NtClose(EventPair);
  61         /* WaitForSingleObject(Thread, INFINITE); FIXME: Waiting on thread handle causes double spinlock acquisition (and subsequent crash) in PsUnblockThread -  ntoskrnl/ps/thread.c */
  62         NtClose(Thread);
  63         printf("Main: Terminating...\n");
  64         return 0;
  65 }