diff options
Diffstat (limited to 'tests/tryentercs.c')
| -rw-r--r-- | tests/tryentercs.c | 70 |
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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