170 lines
3.5 KiB
C
170 lines
3.5 KiB
C
/******************************************************************************
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Copyright (c) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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******************************************************************************/
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#ifdef _WIN32
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#include <windows.h>
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#include "base.h"
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#include "platform.h"
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#include "bmem.h"
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#include "../../w32-pthreads/pthread.h"
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static bool have_clockfreq = false;
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static LARGE_INTEGER clock_freq;
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static uint32_t winver = 0;
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static inline uint64_t get_clockfreq(void)
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{
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if (!have_clockfreq)
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QueryPerformanceFrequency(&clock_freq);
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return clock_freq.QuadPart;
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}
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static inline uint32_t get_winver(void)
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{
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if (!winver) {
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OSVERSIONINFO osvi;
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memset(&osvi, 0, sizeof(osvi));
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winver = (osvi.dwMajorVersion << 16) | (osvi.dwMinorVersion);
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}
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return winver;
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}
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void *os_dlopen(const char *path)
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{
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wchar_t *wpath;
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HMODULE h_library = NULL;
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os_utf8_to_wcs(path, 0, &wpath);
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h_library = LoadLibraryW(wpath);
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bfree(wpath);
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if (!h_library)
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blog(LOG_INFO, "LoadLibrary failed for '%s', error: %u",
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path, GetLastError());
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return h_library;
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}
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void *os_dlsym(void *module, const char *func)
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{
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return (void*)GetProcAddress(module, func);
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}
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void os_dlclose(void *module)
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{
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FreeLibrary(module);
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}
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void os_sleepto_ns(uint64_t time_target)
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{
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uint64_t t = os_gettime_ns();
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uint32_t milliseconds;
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if (t >= time_target)
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return;
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milliseconds = (uint32_t)((time_target - t)/1000000);
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if (milliseconds > 1)
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os_sleep_ms(milliseconds);
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for (;;) {
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t = os_gettime_ns();
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if (t >= time_target)
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return;
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#if 1
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Sleep(1);
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#else
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Sleep(0);
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#endif
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}
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}
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void os_sleep_ms(uint32_t duration)
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{
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/* windows 8+ appears to have decreased sleep precision */
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if (get_winver() >= 0x0602 && duration > 0)
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duration--;
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Sleep(duration);
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}
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uint64_t os_gettime_ns(void)
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{
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LARGE_INTEGER current_time;
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double time_val;
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QueryPerformanceCounter(¤t_time);
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time_val = (double)current_time.QuadPart;
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time_val *= 1000000000.0;
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time_val /= (double)get_clockfreq();
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return (uint64_t)time_val;
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}
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uint64_t os_gettime_ms(void)
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{
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LARGE_INTEGER current_time;
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uint64_t time_val;
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QueryPerformanceCounter(¤t_time);
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time_val = current_time.QuadPart;
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time_val *= 1000;
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time_val /= get_clockfreq();
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return time_val;
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}
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#ifdef PTW32_STATIC_LIB
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BOOL WINAPI DllMain(HINSTANCE hinst_dll, DWORD reason, LPVOID reserved)
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{
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switch (reason) {
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case DLL_PROCESS_ATTACH:
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pthread_win32_process_attach_np();
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break;
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case DLL_PROCESS_DETACH:
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pthread_win32_process_detach_np();
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break;
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case DLL_THREAD_ATTACH:
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pthread_win32_thread_attach_np();
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break;
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case DLL_THREAD_DETACH:
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pthread_win32_thread_detach_np();
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break;
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}
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return true;
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}
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#endif
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#endif
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