blob: 5b4dee618031b380565e6b3e2a1a5d1bc3ebc793 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/*
* 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()
{
LPCRITICAL_SECTION lpcs = NULL;
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)
{
SetLastError(0);
(*_try_enter_critical_section)(lpcs);
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);
}
|
