Mirrored_Repos/LookingGlass
1
0
Fork 0
mirror of https://github.com/gnif/LookingGlass.git synced 2026-11-12 23:07:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[common/client] platform: make timing waits portable

Browse Source
This commit is contained in:
Geoffrey McRae
2026-09-12 08:13:16 +10:00
parent d045ac6ba7
commit 9c8343df96
18 changed files with 351 additions and 161 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
common/include/common/event.h
View File

@@ -22,9 +22,10 @@
#define _H_LG_COMMON_EVENT_
#include <stdbool.h>
#include <time.h>
#include <stdint.h>
#define TIMEOUT_INFINITE ((unsigned int)~0)
#define TIMEOUT_INFINITE_NS UINT64_MAX
typedef struct LGEvent LGEvent;
@@ -38,8 +39,7 @@ bool lgResetEvent (LGEvent * handle);
// for windows this is an event HANDLE
LGEvent * lgWrapEvent(void * handle);
// Posix specific, not implmented/possible in windows
bool lgWaitEventAbs(LGEvent * handle, struct timespec * ts);
bool lgWaitEventNS (LGEvent * handle, unsigned int timeout);
bool lgWaitEventDeadline(LGEvent * handle, uint64_t deadlineNs);
bool lgWaitEventNS (LGEvent * handle, uint64_t timeoutNs);
#endif

115
common/include/common/time.h
View File

@@ -20,120 +20,15 @@
#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include "common/util.h"
#if defined(_WIN32)
#include <windows.h>
void windowsSetTimerResolution(void);
NTSYSCALLAPI NTSTATUS NTAPI NtDelayExecution(
_In_ BOOLEAN Alertable,
_In_opt_ PLARGE_INTEGER DelayInterval
);
#endif
#include <stdint.h>
typedef struct LGTimer LGTimer;
static inline uint64_t microtime(void)
{
#if defined(_WIN32)
static unsigned long div = 0;
if (unlikely(div == 0))
{
LARGE_INTEGER freq = { .QuadPart = 0LL };
QueryPerformanceFrequency(&freq);
div = freq.QuadPart / 1000000LL;
if(div == 0)
abort();
}
LARGE_INTEGER time;
QueryPerformanceCounter(&time);
return time.QuadPart / div;
#else
struct timespec time;
clock_gettime(CLOCK_MONOTONIC, &time);
return (uint64_t)time.tv_sec * 1000000LL + time.tv_nsec / 1000LL;
#endif
}
static inline void nsleep(uint64_t ns)
{
#if defined(_WIN32)
LARGE_INTEGER interval = { .QuadPart = -(int64_t)(ns / 100LL) };
NtDelayExecution(FALSE, &interval);
#else
const struct timespec ts =
{
.tv_sec = ns / 1000000000,
.tv_nsec = ns % 1000000000,
};
nanosleep(&ts, NULL);
#endif
}
static inline uint64_t nanotime(void)
{
#if defined(_WIN32)
static double multiplier = 0.0;
if (unlikely(!multiplier))
{
LARGE_INTEGER freq = { .QuadPart = 0LL };
QueryPerformanceFrequency(&freq);
if (freq.QuadPart == 0)
abort();
multiplier = 1e9 / freq.QuadPart;
}
LARGE_INTEGER time;
QueryPerformanceCounter(&time);
return (uint64_t) (time.QuadPart * multiplier);
#else
struct timespec time;
clock_gettime(CLOCK_MONOTONIC_RAW, &time);
return ((uint64_t)time.tv_sec * 1000000000LL) + time.tv_nsec;
#endif
}
static inline void tsDiff(struct timespec *diff, const struct timespec *left,
const struct timespec *right)
{
diff->tv_sec = left->tv_sec - right->tv_sec;
diff->tv_nsec = left->tv_nsec - right->tv_nsec;
if (diff->tv_nsec < 0)
{
--diff->tv_sec;
diff->tv_nsec += 1000000000;
}
}
static inline uint32_t __iter_div_u64_rem(uint64_t dividend, uint32_t divisor, uint64_t *remainder)
{
uint32_t ret = 0;
while (dividend >= divisor) {
/* The following asm() prevents the compiler from
optimising this loop into a modulo operation. */
asm("" : "+rm"(dividend));
dividend -= divisor;
ret++;
}
*remainder = dividend;
return ret;
}
static inline void tsAdd(struct timespec *a, uint64_t ns)
{
a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, 1000000000L, &ns);
a->tv_nsec = ns;
}
void lgTimeInit(void);
uint64_t microtime (void);
uint64_t nanotime (void);
void nsleep (uint64_t ns);
typedef bool (*LGTimerFn)(void * udata);