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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gos/gos_win32.c
* @brief GOS Win32 Operating System support.
*/
#include "gfx.h"
#if GFX_USE_OS_WIN32
#include <stdio.h>
static HANDLE SystemMutex;
void _gosInit(void)
{
/* No initialization of the operating system itself is needed */
}
void _gosDeinit(void)
{
}
void gfxHalt(const char *msg) {
if (msg)
fprintf(stderr, "%s\n", msg);
ExitProcess(1);
}
void gfxSleepMicroseconds(delaytime_t ms) {
static LARGE_INTEGER pcfreq;
static int initflag;
LARGE_INTEGER t1, t2, tdiff;
switch(ms) {
case TIME_IMMEDIATE:
return;
case TIME_INFINITE:
while(1)
Sleep(1000);
return;
}
if (!initflag) {
QueryPerformanceFrequency(&pcfreq);
initflag++;
}
tdiff.QuadPart = pcfreq.QuadPart * ms / 1000000;
QueryPerformanceCounter(&t1);
do {
QueryPerformanceCounter(&t2);
} while (t2.QuadPart - t1.QuadPart < tdiff.QuadPart);
}
void gfxSystemLock(void) {
if (!SystemMutex)
SystemMutex = CreateMutex(0, FALSE, 0);
WaitForSingleObject(SystemMutex, INFINITE);
}
void gfxSystemUnlock(void) {
ReleaseMutex(SystemMutex);
}
bool_t gfxSemWait(gfxSem *psem, delaytime_t ms) {
return WaitForSingleObject(*psem, ms) == WAIT_OBJECT_0;
}
typedef LONG __stdcall (*_NtQuerySemaphore)(
HANDLE SemaphoreHandle,
DWORD SemaphoreInformationClass, /* Would be SEMAPHORE_INFORMATION_CLASS */
PVOID SemaphoreInformation, /* but this is to much to dump here */
ULONG SemaphoreInformationLength,
PULONG ReturnLength OPTIONAL
);
semcount_t gfxSemCounter(gfxSem *pSem) {
static _NtQuerySemaphore NtQuerySemaphore;
struct _SEMAPHORE_BASIC_INFORMATION {
ULONG CurrentCount;
ULONG MaximumCount;
} BasicInfo;
if (!NtQuerySemaphore)
NtQuerySemaphore = (_NtQuerySemaphore)GetProcAddress(GetModuleHandle("ntdll.dll"), "NtQuerySemaphore");
NtQuerySemaphore(*pSem, 0, &BasicInfo, sizeof(BasicInfo), 0);
return BasicInfo.CurrentCount;
}
gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param) {
(void) stackarea;
HANDLE thd;
if (!(thd = CreateThread(0, stacksz, fn, param, CREATE_SUSPENDED, 0)))
return FALSE;
SetThreadPriority(thd, prio);
ResumeThread(thd);
return thd;
}
threadreturn_t gfxThreadWait(gfxThreadHandle thread) {
DWORD ret;
WaitForSingleObject(thread, INFINITE);
GetExitCodeThread(thread, &ret);
CloseHandle(thread);
return ret;
}
#endif /* GFX_USE_OS_WIN32 */
/** @} */
|
