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hdhomerun_os_windows.c
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hdhomerun_os_windows.c
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/*
* hdhomerun_os_windows.c
*
* Copyright © 2006-2017 Silicondust USA Inc. <www.silicondust.com>.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "hdhomerun.h"
void random_getbytes(uint8_t *out, size_t length)
{
BCryptGenRandom(NULL, out, (ULONG)length, BCRYPT_USE_SYSTEM_PREFERRED_RNG);
}
uint32_t random_get32(void)
{
uint32_t Result;
random_getbytes((uint8_t *)&Result, 4);
return Result;
}
uint64_t getcurrenttime(void)
{
return GetTickCount64();
}
uint64_t timer_get_hires_ticks(void)
{
LARGE_INTEGER count;
if (!QueryPerformanceCounter(&count)) {
return 0;
}
return count.QuadPart;
}
uint64_t timer_get_hires_frequency(void)
{
LARGE_INTEGER count;
if (!QueryPerformanceFrequency(&count)) {
return 0;
}
return count.QuadPart;
}
void msleep_approx(uint64_t ms)
{
Sleep((DWORD)ms);
}
void msleep_minimum(uint64_t ms)
{
uint64_t stop_time = getcurrenttime() + ms;
while (1) {
uint64_t current_time = getcurrenttime();
if (current_time >= stop_time) {
return;
}
msleep_approx(stop_time - current_time);
}
}
struct thread_task_execute_args_t {
thread_task_func_t func;
void *arg;
};
static DWORD WINAPI thread_task_execute(void *arg)
{
struct thread_task_execute_args_t *execute_args = (struct thread_task_execute_args_t *)arg;
execute_args->func(execute_args->arg);
free(execute_args);
return 0;
}
bool thread_task_create(thread_task_t *tid, thread_task_func_t func, void *arg)
{
struct thread_task_execute_args_t *execute_args = (struct thread_task_execute_args_t *)malloc(sizeof(struct thread_task_execute_args_t));
if (!execute_args) {
return false;
}
execute_args->func = func;
execute_args->arg = arg;
*tid = CreateThread(NULL, 0, thread_task_execute, execute_args, 0, NULL);
if (!*tid) {
free(execute_args);
return false;
}
return true;
}
void thread_task_join(thread_task_t tid)
{
WaitForSingleObject(tid, INFINITE);
CloseHandle(tid);
}
void thread_mutex_init(thread_mutex_t *mutex)
{
*mutex = CreateMutex(NULL, false, NULL);
}
void thread_mutex_dispose(thread_mutex_t *mutex)
{
CloseHandle(*mutex);
}
void thread_mutex_lock(thread_mutex_t *mutex)
{
WaitForSingleObject(*mutex, INFINITE);
}
void thread_mutex_unlock(thread_mutex_t *mutex)
{
ReleaseMutex(*mutex);
}
void thread_cond_init(thread_cond_t *cond)
{
*cond = CreateEvent(NULL, false, false, NULL);
}
void thread_cond_dispose(thread_cond_t *cond)
{
CloseHandle(*cond);
}
void thread_cond_signal(thread_cond_t *cond)
{
SetEvent(*cond);
}
void thread_cond_wait(thread_cond_t *cond)
{
WaitForSingleObject(*cond, INFINITE);
}
bool thread_cond_wait_with_timeout(thread_cond_t *cond, uint64_t max_wait_time)
{
return (WaitForSingleObject(*cond, (DWORD)max_wait_time) == WAIT_OBJECT_0);
}
bool hdhomerun_vsprintf(char *buffer, char *end, const char *fmt, va_list ap)
{
if (buffer >= end) {
return false;
}
int length = _vsnprintf(buffer, end - buffer - 1, fmt, ap);
if (length < 0) {
*buffer = 0;
return false;
}
if (buffer + length + 1 > end) {
*(end - 1) = 0;
return false;
}
return true;
}
bool hdhomerun_sprintf(char *buffer, char *end, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
bool result = hdhomerun_vsprintf(buffer, end, fmt, ap);
va_end(ap);
return result;
}