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+/*
+ * 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 (PT_STDCALL *)(LPCRITICAL_SECTION))
+ GetProcAddress(_h_kernel32,
+ (LPCSTR) "TryEnterCriticalSection");
+
+ if (_try_enter_critical_section != NULL)
+ {
+ InitializeCriticalSection(&cs);
+
+ SetLastError(0);
+
+ if ((*_try_enter_critical_section)(&cs) != 0)
+ {
+ LeaveCriticalSection(&cs);
+ }
+ else
+ {
+ printf("Last Error [try enter] %ld\n", (long) GetLastError());
+
+ _try_enter_critical_section = NULL;
+ }
+ DeleteCriticalSection(&cs);
+ }
+
+ (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);
+}
+