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Added a README file regarding WinRT support

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David Ludwig 2014-04-09 21:29:19 -04:00
commit 3dcb451f85
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389
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
#include "SDL_timer.h"
#include "SDL_timer_c.h"
#include "SDL_atomic.h"
#include "SDL_cpuinfo.h"
#include "SDL_thread.h"
/* #define DEBUG_TIMERS */
typedef struct _SDL_Timer
{
int timerID;
SDL_TimerCallback callback;
void *param;
Uint32 interval;
Uint32 scheduled;
volatile SDL_bool canceled;
struct _SDL_Timer *next;
} SDL_Timer;
typedef struct _SDL_TimerMap
{
int timerID;
SDL_Timer *timer;
struct _SDL_TimerMap *next;
} SDL_TimerMap;
/* The timers are kept in a sorted list */
typedef struct {
/* Data used by the main thread */
SDL_Thread *thread;
SDL_atomic_t nextID;
SDL_TimerMap *timermap;
SDL_mutex *timermap_lock;
/* Padding to separate cache lines between threads */
char cache_pad[SDL_CACHELINE_SIZE];
/* Data used to communicate with the timer thread */
SDL_SpinLock lock;
SDL_sem *sem;
SDL_Timer * volatile pending;
SDL_Timer * volatile freelist;
volatile SDL_bool active;
/* List of timers - this is only touched by the timer thread */
SDL_Timer *timers;
} SDL_TimerData;
static SDL_TimerData SDL_timer_data;
/* The idea here is that any thread might add a timer, but a single
* thread manages the active timer queue, sorted by scheduling time.
*
* Timers are removed by simply setting a canceled flag
*/
static void
SDL_AddTimerInternal(SDL_TimerData *data, SDL_Timer *timer)
{
SDL_Timer *prev, *curr;
prev = NULL;
for (curr = data->timers; curr; prev = curr, curr = curr->next) {
if ((Sint32)(timer->scheduled-curr->scheduled) < 0) {
break;
}
}
/* Insert the timer here! */
if (prev) {
prev->next = timer;
} else {
data->timers = timer;
}
timer->next = curr;
}
static int
SDL_TimerThread(void *_data)
{
SDL_TimerData *data = (SDL_TimerData *)_data;
SDL_Timer *pending;
SDL_Timer *current;
SDL_Timer *freelist_head = NULL;
SDL_Timer *freelist_tail = NULL;
Uint32 tick, now, interval, delay;
/* Threaded timer loop:
* 1. Queue timers added by other threads
* 2. Handle any timers that should dispatch this cycle
* 3. Wait until next dispatch time or new timer arrives
*/
for ( ; ; ) {
/* Pending and freelist maintenance */
SDL_AtomicLock(&data->lock);
{
/* Get any timers ready to be queued */
pending = data->pending;
data->pending = NULL;
/* Make any unused timer structures available */
if (freelist_head) {
freelist_tail->next = data->freelist;
data->freelist = freelist_head;
}
}
SDL_AtomicUnlock(&data->lock);
/* Sort the pending timers into our list */
while (pending) {
current = pending;
pending = pending->next;
SDL_AddTimerInternal(data, current);
}
freelist_head = NULL;
freelist_tail = NULL;
/* Check to see if we're still running, after maintenance */
if (!data->active) {
break;
}
/* Initial delay if there are no timers */
delay = SDL_MUTEX_MAXWAIT;
tick = SDL_GetTicks();
/* Process all the pending timers for this tick */
while (data->timers) {
current = data->timers;
if ((Sint32)(tick-current->scheduled) < 0) {
/* Scheduled for the future, wait a bit */
delay = (current->scheduled - tick);
break;
}
/* We're going to do something with this timer */
data->timers = current->next;
if (current->canceled) {
interval = 0;
} else {
interval = current->callback(current->interval, current->param);
}
if (interval > 0) {
/* Reschedule this timer */
current->scheduled = tick + interval;
SDL_AddTimerInternal(data, current);
} else {
if (!freelist_head) {
freelist_head = current;
}
if (freelist_tail) {
freelist_tail->next = current;
}
freelist_tail = current;
current->canceled = SDL_TRUE;
}
}
/* Adjust the delay based on processing time */
now = SDL_GetTicks();
interval = (now - tick);
if (interval > delay) {
delay = 0;
} else {
delay -= interval;
}
/* Note that each time a timer is added, this will return
immediately, but we process the timers added all at once.
That's okay, it just means we run through the loop a few
extra times.
*/
SDL_SemWaitTimeout(data->sem, delay);
}
return 0;
}
int
SDL_TimerInit(void)
{
SDL_TimerData *data = &SDL_timer_data;
if (!data->active) {
const char *name = "SDLTimer";
data->timermap_lock = SDL_CreateMutex();
if (!data->timermap_lock) {
return -1;
}
data->sem = SDL_CreateSemaphore(0);
if (!data->sem) {
SDL_DestroyMutex(data->timermap_lock);
return -1;
}
data->active = SDL_TRUE;
/* !!! FIXME: this is nasty. */
#if defined(__WIN32__) && !defined(HAVE_LIBC)
#undef SDL_CreateThread
#if SDL_DYNAMIC_API
data->thread = SDL_CreateThread_REAL(SDL_TimerThread, name, data, NULL, NULL);
#else
data->thread = SDL_CreateThread(SDL_TimerThread, name, data, NULL, NULL);
#endif
#else
data->thread = SDL_CreateThread(SDL_TimerThread, name, data);
#endif
if (!data->thread) {
SDL_TimerQuit();
return -1;
}
SDL_AtomicSet(&data->nextID, 1);
}
return 0;
}
void
SDL_TimerQuit(void)
{
SDL_TimerData *data = &SDL_timer_data;
SDL_Timer *timer;
SDL_TimerMap *entry;
if (data->active) {
data->active = SDL_FALSE;
/* Shutdown the timer thread */
if (data->thread) {
SDL_SemPost(data->sem);
SDL_WaitThread(data->thread, NULL);
data->thread = NULL;
}
SDL_DestroySemaphore(data->sem);
data->sem = NULL;
/* Clean up the timer entries */
while (data->timers) {
timer = data->timers;
data->timers = timer->next;
SDL_free(timer);
}
while (data->freelist) {
timer = data->freelist;
data->freelist = timer->next;
SDL_free(timer);
}
while (data->timermap) {
entry = data->timermap;
data->timermap = entry->next;
SDL_free(entry);
}
SDL_DestroyMutex(data->timermap_lock);
data->timermap_lock = NULL;
}
}
SDL_TimerID
SDL_AddTimer(Uint32 interval, SDL_TimerCallback callback, void *param)
{
SDL_TimerData *data = &SDL_timer_data;
SDL_Timer *timer;
SDL_TimerMap *entry;
if (!data->active) {
int status = 0;
SDL_AtomicLock(&data->lock);
if (!data->active) {
status = SDL_TimerInit();
}
SDL_AtomicUnlock(&data->lock);
if (status < 0) {
return 0;
}
}
SDL_AtomicLock(&data->lock);
timer = data->freelist;
if (timer) {
data->freelist = timer->next;
}
SDL_AtomicUnlock(&data->lock);
if (timer) {
SDL_RemoveTimer(timer->timerID);
} else {
timer = (SDL_Timer *)SDL_malloc(sizeof(*timer));
if (!timer) {
SDL_OutOfMemory();
return 0;
}
}
timer->timerID = SDL_AtomicIncRef(&data->nextID);
timer->callback = callback;
timer->param = param;
timer->interval = interval;
timer->scheduled = SDL_GetTicks() + interval;
timer->canceled = SDL_FALSE;
entry = (SDL_TimerMap *)SDL_malloc(sizeof(*entry));
if (!entry) {
SDL_free(timer);
SDL_OutOfMemory();
return 0;
}
entry->timer = timer;
entry->timerID = timer->timerID;
SDL_LockMutex(data->timermap_lock);
entry->next = data->timermap;
data->timermap = entry;
SDL_UnlockMutex(data->timermap_lock);
/* Add the timer to the pending list for the timer thread */
SDL_AtomicLock(&data->lock);
timer->next = data->pending;
data->pending = timer;
SDL_AtomicUnlock(&data->lock);
/* Wake up the timer thread if necessary */
SDL_SemPost(data->sem);
return entry->timerID;
}
SDL_bool
SDL_RemoveTimer(SDL_TimerID id)
{
SDL_TimerData *data = &SDL_timer_data;
SDL_TimerMap *prev, *entry;
SDL_bool canceled = SDL_FALSE;
/* Find the timer */
SDL_LockMutex(data->timermap_lock);
prev = NULL;
for (entry = data->timermap; entry; prev = entry, entry = entry->next) {
if (entry->timerID == id) {
if (prev) {
prev->next = entry->next;
} else {
data->timermap = entry->next;
}
break;
}
}
SDL_UnlockMutex(data->timermap_lock);
if (entry) {
if (!entry->timer->canceled) {
entry->timer->canceled = SDL_TRUE;
canceled = SDL_TRUE;
}
SDL_free(entry);
}
return canceled;
}
/* vi: set ts=4 sw=4 expandtab: */

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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
/* Useful functions and variables from SDL_timer.c */
#include "SDL_timer.h"
#define ROUND_RESOLUTION(X) \
(((X+TIMER_RESOLUTION-1)/TIMER_RESOLUTION)*TIMER_RESOLUTION)
extern void SDL_TicksInit(void);
extern void SDL_TicksQuit(void);
extern int SDL_TimerInit(void);
extern void SDL_TimerQuit(void);
/* vi: set ts=4 sw=4 expandtab: */

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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if defined(SDL_TIMER_DUMMY) || defined(SDL_TIMERS_DISABLED)
#include "SDL_timer.h"
static SDL_bool ticks_started = SDL_FALSE;
void
SDL_TicksInit(void)
{
if (ticks_started) {
return;
}
ticks_started = SDL_TRUE;
}
void
SDL_TicksQuit(void)
{
ticks_started = SDL_FALSE;
}
Uint32
SDL_GetTicks(void)
{
if (!ticks_started) {
SDL_TicksInit();
}
SDL_Unsupported();
return 0;
}
Uint64
SDL_GetPerformanceCounter(void)
{
return SDL_GetTicks();
}
Uint64
SDL_GetPerformanceFrequency(void)
{
return 1000;
}
void
SDL_Delay(Uint32 ms)
{
SDL_Unsupported();
}
#endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */

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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#ifdef SDL_TIMER_HAIKU
#include <os/kernel/OS.h>
#include "SDL_timer.h"
static bigtime_t start;
static SDL_bool ticks_started = SDL_FALSE;
void
SDL_TicksInit(void)
{
if (ticks_started) {
return;
}
ticks_started = SDL_TRUE;
/* Set first ticks value */
start = system_time();
}
void
SDL_TicksQuit(void)
{
ticks_started = SDL_FALSE;
}
Uint32
SDL_GetTicks(void)
{
if (!ticks_started) {
SDL_TicksInit();
}
return ((system_time() - start) / 1000);
}
Uint64
SDL_GetPerformanceCounter(void)
{
return system_time();
}
Uint64
SDL_GetPerformanceFrequency(void)
{
return 1000000;
}
void
SDL_Delay(Uint32 ms)
{
snooze(ms * 1000);
}
#endif /* SDL_TIMER_HAIKU */
/* vi: set ts=4 sw=4 expandtab: */

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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_thread.h"
#include "SDL_timer.h"
#include "SDL_error.h"
#include "../SDL_timer_c.h"
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <pspthreadman.h>
static struct timeval start;
static SDL_bool ticks_started = SDL_FALSE;
void
SDL_TicksInit(void)
{
if (ticks_started) {
return;
}
ticks_started = SDL_TRUE;
gettimeofday(&start, NULL);
}
void
SDL_TicksQuit(void)
{
ticks_started = SDL_FALSE;
}
Uint32 SDL_GetTicks(void)
{
if (!ticks_started) {
SDL_TicksInit();
}
struct timeval now;
Uint32 ticks;
gettimeofday(&now, NULL);
ticks=(now.tv_sec-start.tv_sec)*1000+(now.tv_usec-start.tv_usec)/1000;
return(ticks);
}
Uint64
SDL_GetPerformanceCounter(void)
{
return SDL_GetTicks();
}
Uint64
SDL_GetPerformanceFrequency(void)
{
return 1000;
}
void SDL_Delay(Uint32 ms)
{
const Uint32 max_delay = 0xffffffffUL / 1000;
if(ms > max_delay)
ms = max_delay;
sceKernelDelayThreadCB(ms * 1000);
}
/* vim: ts=4 sw=4
*/

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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#ifdef SDL_TIMER_UNIX
#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
#include "SDL_timer.h"
/* The clock_gettime provides monotonous time, so we should use it if
it's available. The clock_gettime function is behind ifdef
for __USE_POSIX199309
Tommi Kyntola (tommi.kyntola@ray.fi) 27/09/2005
*/
/* Reworked monotonic clock to not assume the current system has one
as not all linux kernels provide a monotonic clock (yeah recent ones
probably do)
Also added OS X Monotonic clock support
Based on work in https://github.com/ThomasHabets/monotonic_clock
*/
#if HAVE_NANOSLEEP || HAVE_CLOCK_GETTIME
#include <time.h>
#endif
#ifdef __APPLE__
#include <mach/mach_time.h>
#endif
/* The first ticks value of the application */
#if HAVE_CLOCK_GETTIME
static struct timespec start_ts;
#elif defined(__APPLE__)
static uint64_t start_mach;
mach_timebase_info_data_t mach_base_info;
#endif
static SDL_bool has_monotonic_time = SDL_FALSE;
static struct timeval start_tv;
static SDL_bool ticks_started = SDL_FALSE;
void
SDL_TicksInit(void)
{
if (ticks_started) {
return;
}
ticks_started = SDL_TRUE;
/* Set first ticks value */
#if HAVE_CLOCK_GETTIME
if (clock_gettime(CLOCK_MONOTONIC, &start_ts) == 0) {
has_monotonic_time = SDL_TRUE;
} else
#elif defined(__APPLE__)
kern_return_t ret = mach_timebase_info(&mach_base_info);
if (ret == 0) {
has_monotonic_time = SDL_TRUE;
start_mach = mach_absolute_time();
} else
#endif
{
gettimeofday(&start_tv, NULL);
}
}
void
SDL_TicksQuit(void)
{
ticks_started = SDL_FALSE;
}
Uint32
SDL_GetTicks(void)
{
Uint32 ticks;
if (!ticks_started) {
SDL_TicksInit();
}
if (has_monotonic_time) {
#if HAVE_CLOCK_GETTIME
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
ticks = (now.tv_sec - start_ts.tv_sec) * 1000 + (now.tv_nsec -
start_ts.tv_nsec) / 1000000;
#elif defined(__APPLE__)
uint64_t now = mach_absolute_time();
ticks = (((now - start_mach) * mach_base_info.numer) / mach_base_info.denom) / 1000000;
#endif
} else {
struct timeval now;
gettimeofday(&now, NULL);
ticks =
(now.tv_sec - start_tv.tv_sec) * 1000 + (now.tv_usec -
start_tv.tv_usec) / 1000;
}
return (ticks);
}
Uint64
SDL_GetPerformanceCounter(void)
{
Uint64 ticks;
if (!ticks_started) {
SDL_TicksInit();
}
if (has_monotonic_time) {
#if HAVE_CLOCK_GETTIME
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
ticks = now.tv_sec;
ticks *= 1000000000;
ticks += now.tv_nsec;
#elif defined(__APPLE__)
ticks = mach_absolute_time();
#endif
} else {
struct timeval now;
gettimeofday(&now, NULL);
ticks = now.tv_sec;
ticks *= 1000000;
ticks += now.tv_usec;
}
return (ticks);
}
Uint64
SDL_GetPerformanceFrequency(void)
{
if (!ticks_started) {
SDL_TicksInit();
}
if (has_monotonic_time) {
#if HAVE_CLOCK_GETTIME
return 1000000000;
#elif defined(__APPLE__)
Uint64 freq = mach_base_info.denom;
freq *= 1000000000;
freq /= mach_base_info.numer;
return freq;
#endif
}
return 1000000;
}
void
SDL_Delay(Uint32 ms)
{
int was_error;
#if HAVE_NANOSLEEP
struct timespec elapsed, tv;
#else
struct timeval tv;
Uint32 then, now, elapsed;
#endif
/* Set the timeout interval */
#if HAVE_NANOSLEEP
elapsed.tv_sec = ms / 1000;
elapsed.tv_nsec = (ms % 1000) * 1000000;
#else
then = SDL_GetTicks();
#endif
do {
errno = 0;
#if HAVE_NANOSLEEP
tv.tv_sec = elapsed.tv_sec;
tv.tv_nsec = elapsed.tv_nsec;
was_error = nanosleep(&tv, &elapsed);
#else
/* Calculate the time interval left (in case of interrupt) */
now = SDL_GetTicks();
elapsed = (now - then);
then = now;
if (elapsed >= ms) {
break;
}
ms -= elapsed;
tv.tv_sec = ms / 1000;
tv.tv_usec = (ms % 1000) * 1000;
was_error = select(0, NULL, NULL, NULL, &tv);
#endif /* HAVE_NANOSLEEP */
} while (was_error && (errno == EINTR));
}
#endif /* SDL_TIMER_UNIX */
/* vi: set ts=4 sw=4 expandtab: */

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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#ifdef SDL_TIMER_WINDOWS
#include "../../core/windows/SDL_windows.h"
#include <mmsystem.h>
#include "SDL_timer.h"
#include "SDL_hints.h"
/* The first (low-resolution) ticks value of the application */
static DWORD start;
static BOOL ticks_started = FALSE;
#ifndef USE_GETTICKCOUNT
/* Store if a high-resolution performance counter exists on the system */
static BOOL hires_timer_available;
/* The first high-resolution ticks value of the application */
static LARGE_INTEGER hires_start_ticks;
/* The number of ticks per second of the high-resolution performance counter */
static LARGE_INTEGER hires_ticks_per_second;
#ifndef __WINRT__
static void
timeSetPeriod(UINT uPeriod)
{
static UINT timer_period = 0;
if (uPeriod != timer_period) {
if (timer_period) {
timeEndPeriod(timer_period);
}
timer_period = uPeriod;
if (timer_period) {
timeBeginPeriod(timer_period);
}
}
}
static void
SDL_TimerResolutionChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
UINT uPeriod;
/* Unless the hint says otherwise, let's have good sleep precision */
if (hint && *hint) {
uPeriod = SDL_atoi(hint);
} else {
uPeriod = 1;
}
if (uPeriod || oldValue != hint) {
timeSetPeriod(uPeriod);
}
}
#endif /* ifndef __WINRT__ */
#endif /* !USE_GETTICKCOUNT */
void
SDL_TicksInit(void)
{
if (ticks_started) {
return;
}
ticks_started = SDL_TRUE;
/* Set first ticks value */
#ifdef USE_GETTICKCOUNT
start = GetTickCount();
#else
/* QueryPerformanceCounter has had problems in the past, but lots of games
use it, so we'll rely on it here.
*/
if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) {
hires_timer_available = TRUE;
QueryPerformanceCounter(&hires_start_ticks);
} else {
hires_timer_available = FALSE;
#ifdef __WINRT__
start = 0; /* the timer failed to start! */
#else
timeSetPeriod(1); /* use 1 ms timer precision */
start = timeGetTime();
SDL_AddHintCallback(SDL_HINT_TIMER_RESOLUTION,
SDL_TimerResolutionChanged, NULL);
#endif /* __WINRT__ */
}
#endif /* USE_GETTICKCOUNT */
}
void
SDL_TicksQuit(void)
{
#ifndef USE_GETTICKCOUNT
if (!hires_timer_available) {
#ifndef __WINRT__
SDL_DelHintCallback(SDL_HINT_TIMER_RESOLUTION,
SDL_TimerResolutionChanged, NULL);
timeSetPeriod(0);
#endif /* __WINRT__ */
}
#endif /* USE_GETTICKCOUNT */
ticks_started = SDL_FALSE;
}
Uint32
SDL_GetTicks(void)
{
DWORD now;
#ifndef USE_GETTICKCOUNT
LARGE_INTEGER hires_now;
#endif
if (!ticks_started) {
SDL_TicksInit();
}
#ifdef USE_GETTICKCOUNT
now = GetTickCount();
#else
if (hires_timer_available) {
QueryPerformanceCounter(&hires_now);
hires_now.QuadPart -= hires_start_ticks.QuadPart;
hires_now.QuadPart *= 1000;
hires_now.QuadPart /= hires_ticks_per_second.QuadPart;
return (DWORD) hires_now.QuadPart;
} else {
#ifdef __WINRT__
now = 0;
#else
now = timeGetTime();
#endif /* __WINRT__ */
}
#endif
return (now - start);
}
Uint64
SDL_GetPerformanceCounter(void)
{
LARGE_INTEGER counter;
if (!QueryPerformanceCounter(&counter)) {
return SDL_GetTicks();
}
return counter.QuadPart;
}
Uint64
SDL_GetPerformanceFrequency(void)
{
LARGE_INTEGER frequency;
if (!QueryPerformanceFrequency(&frequency)) {
return 1000;
}
return frequency.QuadPart;
}
#ifdef __WINRT__
static void
Sleep(DWORD timeout)
{
static HANDLE mutex = 0;
if ( ! mutex )
{
mutex = CreateEventEx(0, 0, 0, EVENT_ALL_ACCESS);
}
WaitForSingleObjectEx(mutex, timeout, FALSE);
}
#endif
void
SDL_Delay(Uint32 ms)
{
Sleep(ms);
}
#endif /* SDL_TIMER_WINDOWS */
/* vi: set ts=4 sw=4 expandtab: */