github.com/ice-blockchain/go/src@v0.0.0-20240403114104-1564d284e521/runtime/testdata/testwinlibsignal/main.c (about)

     1  #include <windows.h>
     2  #include <stdio.h>
     3  
     4  HANDLE waitForCtrlBreakEvent;
     5  
     6  BOOL WINAPI CtrlHandler(DWORD fdwCtrlType)
     7  {
     8      switch (fdwCtrlType)
     9      {
    10      case CTRL_BREAK_EVENT:
    11          SetEvent(waitForCtrlBreakEvent);
    12          return TRUE;
    13      default:
    14          return FALSE;
    15      }
    16  }
    17  
    18  int main(void)
    19  {
    20      waitForCtrlBreakEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
    21      if (!waitForCtrlBreakEvent) {
    22          fprintf(stderr, "ERROR: Could not create event\n");
    23          return 1;
    24      }
    25  
    26      if (!SetConsoleCtrlHandler(CtrlHandler, TRUE))
    27      {
    28          fprintf(stderr, "ERROR: Could not set control handler\n");
    29          return 1;
    30      }
    31  
    32      // The library must be loaded after the SetConsoleCtrlHandler call
    33      // so that the library handler registers after the main program.
    34      // This way the library handler gets called first.
    35      HMODULE dummyDll = LoadLibrary("dummy.dll");
    36      if (!dummyDll) {
    37          fprintf(stderr, "ERROR: Could not load dummy.dll\n");
    38          return 1;
    39      }
    40  
    41      // Call the Dummy function so that Go initialization completes, since
    42      // all cgo entry points call out to _cgo_wait_runtime_init_done.
    43      if (((int(*)(void))GetProcAddress(dummyDll, "Dummy"))() != 42) {
    44          fprintf(stderr, "ERROR: Dummy function did not return 42\n");
    45          return 1;
    46      }
    47  
    48      printf("ready\n");
    49      fflush(stdout);
    50  
    51      if (WaitForSingleObject(waitForCtrlBreakEvent, 5000) != WAIT_OBJECT_0) {
    52          fprintf(stderr, "FAILURE: No signal received\n");
    53          return 1;
    54      }
    55  
    56      return 0;
    57  }