Resolve merge conflicts; minor comment changes.

1 files changed, 70 insertions, 0 deletions

diff --git a/tests/tryentercs.c b/tests/tryentercs.c
new file mode 100644
index 0000000..1125611
--- /dev/null
+++ b/tests/tryentercs.c
@@ -0,0 +1,70 @@
+/*
+ * tryentercs.c
+ *
+ * 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);
+}
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