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Detect if CLOCK_MONOTONIC_RAW is supported

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doylet
2025-07-15 22:14:47 +10:00
parent f6f2148888
commit f66856dae6
4 changed files with 45 additions and 22 deletions
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Source/OS/dn_os_posix.cpp
+27 -13
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@@ -281,19 +281,27 @@ DN_API void DN_OS_SleepMs(DN_UInt milliseconds)
;
}
DN_API uint64_t DN_OS_PerfCounterFrequency()
DN_API DN_U64 DN_OS_PerfCounterFrequency()
{
// NOTE: On Linux we use clock_gettime(CLOCK_MONOTONIC_RAW) which
// NOTE: On Linux we use clock_gettime(CLOCK_MONOTONIC_RAW) (or CLOCK_MONOTONIC) which
// increments at nanosecond granularity.
uint64_t result = 1'000'000'000;
DN_U64 result = 1'000'000'000;
return result;
}
DN_API uint64_t DN_OS_PerfCounterNow()
static DN_POSIXCore *DN_OS_GetPOSIXCore_()
{
DN_Assert(g_dn_os_core_ && g_dn_os_core_->platform_context);
DN_POSIXCore *result = DN_CAST(DN_POSIXCore *)g_dn_os_core_->platform_context;
return result;
}
DN_API DN_U64 DN_OS_PerfCounterNow()
{
DN_POSIXCore *posix = DN_OS_GetPOSIXCore_();
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
uint64_t result = DN_CAST(uint64_t) ts.tv_sec * 1'000'000'000 + DN_CAST(uint64_t) ts.tv_nsec;
clock_gettime(posix->clock_monotonic_raw ? CLOCK_MONOTONIC_RAW : CLOCK_MONOTONIC, &ts);
DN_U64 result = DN_CAST(DN_U64) ts.tv_sec * 1'000'000'000 + DN_CAST(DN_U64) ts.tv_nsec;
return result;
}
@@ -997,13 +1005,6 @@ DN_API DN_OSExecResult DN_OS_ExecPump(DN_OSExecAsyncHandle handle,
return result;
}
static DN_POSIXCore *DN_OS_GetPOSIXCore_()
{
DN_Assert(g_dn_os_core_ && g_dn_os_core_->platform_context);
DN_POSIXCore *result = DN_CAST(DN_POSIXCore *)g_dn_os_core_->platform_context;
return result;
}
static DN_POSIXSyncPrimitive *DN_OS_U64ToPOSIXSyncPrimitive_(DN_U64 u64)
{
DN_POSIXSyncPrimitive *result = nullptr;
@@ -1290,6 +1291,19 @@ DN_API DN_U32 DN_OS_ThreadID()
return DN_CAST(DN_U32) result;
}
DN_API void DN_Posix_Init(DN_POSIXCore *posix)
{
int mutex_init = pthread_mutex_init(&posix->sync_primitive_free_list_mutex, nullptr);
DN_Assert(mutex_init == 0);
struct timespec ts;
posix->clock_monotonic_raw = clock_gettime(CLOCK_MONOTONIC_RAW, &ts) != -1;
if (!posix->clock_monotonic_raw) {
int get_result = clock_gettime(CLOCK_MONOTONIC, &ts);
DN_AssertF(get_result != -1, "CLOCK_MONOTONIC_RAW and CLOCK_MONOTONIC are not supported by this platform");
}
}
DN_API void DN_Posix_ThreadSetName(DN_Str8 name)
{
#if defined(DN_PLATFORM_EMSCRIPTEN)