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authorrpj <rpj>1999-03-08 21:02:20 +0000
committerrpj <rpj>1999-03-08 21:02:20 +0000
commit52f7c3f5ef6d9b70ec385fb390bf27962e68ee3d (patch)
tree030c60c1dcddf64c66956490a8b6333e0036a9bd /tests/tryentercs.c
parent1e9697f3e8f5da2f710a98d9ae8ce3105e61a4a6 (diff)
Resolve merge conflicts; minor comment changes.
Diffstat (limited to 'tests/tryentercs.c')
-rw-r--r--tests/tryentercs.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/tests/tryentercs.c b/tests/tryentercs.c
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index 0000000..1125611
--- /dev/null
+++ b/tests/tryentercs.c
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+/*
+ * 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);
+} \ No newline at end of file