| /* |
| * tryentercs.c |
| * |
| * |
| * -------------------------------------------------------------------------- |
| * |
| * Pthreads-win32 - POSIX Threads Library for Win32 |
| * Copyright(C) 1998 John E. Bossom |
| * Copyright(C) 1999,2005 Pthreads-win32 contributors |
| * |
| * Contact Email: rpj@callisto.canberra.edu.au |
| * |
| * The current list of contributors is contained |
| * in the file CONTRIBUTORS included with the source |
| * code distribution. The list can also be seen at the |
| * following World Wide Web location: |
| * http://sources.redhat.com/pthreads-win32/contributors.html |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library in the file COPYING.LIB; |
| * if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| * |
| * -------------------------------------------------------------------------- |
| * |
| * See if we have the TryEnterCriticalSection function. |
| * Does not use any part of pthreads. |
| */ |
| |
| #include <windows.h> |
| #include <process.h> |
| #include <stdio.h> |
| |
| /* |
| * Function pointer to TryEnterCriticalSection if it exists |
| * - otherwise NULL |
| */ |
| BOOL (WINAPI *_try_enter_critical_section)(LPCRITICAL_SECTION) = NULL; |
| |
| /* |
| * Handle to kernel32.dll |
| */ |
| static HINSTANCE _h_kernel32; |
| |
| |
| int |
| main() |
| { |
| CRITICAL_SECTION cs; |
| |
| SetLastError(0); |
| |
| printf("Last Error [main enter] %ld\n", (long) GetLastError()); |
| |
| /* |
| * Load KERNEL32 and try to get address of TryEnterCriticalSection |
| */ |
| _h_kernel32 = LoadLibrary(TEXT("KERNEL32.DLL")); |
| _try_enter_critical_section = |
| (BOOL (WINAPI *)(LPCRITICAL_SECTION)) |
| GetProcAddress(_h_kernel32, |
| (LPCSTR) "TryEnterCriticalSection"); |
| |
| if (_try_enter_critical_section != NULL) |
| { |
| InitializeCriticalSection(&cs); |
| SetLastError(0); |
| |
| (*_try_enter_critical_section)(&cs); |
| |
| printf("Last Error [try enter] %ld\n", (long) GetLastError()); |
| } |
| |
| (void) FreeLibrary(_h_kernel32); |
| |
| printf("This system %s TryEnterCriticalSection.\n", |
| (_try_enter_critical_section == NULL) ? "DOES NOT SUPPORT" : "SUPPORTS"); |
| printf("POSIX Mutexes will be based on Win32 %s.\n", |
| (_try_enter_critical_section == NULL) ? "Mutexes" : "Critical Sections"); |
| |
| return(0); |
| } |
| |