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timer_management: `sceKernelUsleep` on <1ms delays

This commit is contained in:
psucien 2024-06-10 23:48:06 +02:00
parent c2dc7c3fd4
commit 7fcb758da2
1 changed files with 19 additions and 2 deletions
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21
src/core/libraries/kernel/time_management.cpp
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@ -9,9 +9,16 @@
#include "core/libraries/libs.h"
#ifdef _WIN64
#include <Windows.h>
#include <pthread_time.h>
// http://stackoverflow.com/a/31411628/4725495
static u32(__stdcall* NtDelayExecution)(BOOL Alertable, PLARGE_INTEGER DelayInterval) =
(u32(__stdcall*)(BOOL, PLARGE_INTEGER))GetProcAddress(GetModuleHandle("ntdll.dll"),
"NtDelayExecution");
#else
#include <time.h>
#include <unistd.h>
#endif
namespace Libraries::Kernel {
@ -40,8 +47,18 @@ u64 PS4_SYSV_ABI sceKernelReadTsc() {
}
int PS4_SYSV_ABI sceKernelUsleep(u32 microseconds) {
ASSERT(microseconds >= 1000);
std::this_thread::sleep_for(std::chrono::microseconds(microseconds));
if (microseconds < 1000u) {
#if _WIN64
LARGE_INTEGER interval{
.QuadPart = -1 * (microseconds * 10u),
};
NtDelayExecution(FALSE, &interval);
} else {
std::this_thread::sleep_for(std::chrono::microseconds(microseconds));
}
#else
usleep(microseconds);
#endif
return 0;
}