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Added getCPUTicks() and getCPUTicksPerSeconds() functions.

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This commit is contained in:
Patrick 2025-07-12 16:59:35 +02:00
parent 2cf270df84
commit ba6ffa6c42
2 changed files with 37 additions and 1 deletions
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34
source/mijin/util/os.cpp
View File

@ -10,6 +10,7 @@
#include <mutex>
#include <dlfcn.h>
#include <pthread.h>
#include <time.h>
#elif MIJIN_TARGET_OS == MIJIN_OS_WINDOWS
#include <array>
#include <malloc.h>
@ -42,7 +43,16 @@ namespace mijin
namespace
{
std::mutex gDlErrorMutex; // dlerror may not be thread-safe
}
const std::uint64_t gCPUClockResolution = []()
{
struct timespec time;
[[maybe_unused]] const int result = clock_getres(CLOCK_PROCESS_CPUTIME_ID, &time);
MIJIN_ASSERT(result == 0, "Error getting cputime resolution.");
MIJIN_ASSERT(time.tv_sec == 0, "What kind of cpu clock is this?");
return static_cast<std::uint64_t>(time.tv_nsec);
}();
};
#endif // MIJIN_TARGET_OS == MIJIN_OS_LINUX
//
@ -178,4 +188,26 @@ void alignedFree(void* ptr)
#endif
}
std::uint64_t getCPUTicks() MIJIN_NOEXCEPT
{
#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
struct timespec time;
[[maybe_unused]] const int result = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time);
MIJIN_ASSERT(result == 0, "Error getting cpu time.");
return (static_cast<std::uint64_t>(time.tv_sec) * 1e9 + time.tv_nsec) / gCPUClockResolution;
#else
MIJIN_ERROR("TODO");
return 0;
#endif
}
std::uint64_t getCPUTicksPerSecond() MIJIN_NOEXCEPT
{
#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
return 1e9 / gCPUClockResolution;
#else
MIJIN_ERROR("TODO");
return 0;
#endif
}
} // namespace mijin

4
source/mijin/util/os.hpp
View File

@ -5,6 +5,7 @@
#define MIJIN_UTIL_OS_HPP_INCLUDED 1
#include <csignal>
#include <cstdint>
#include <string>
#include <string_view>
#include <utility>
@ -85,6 +86,9 @@ void setCurrentThreadName(const char* threadName) MIJIN_NOEXCEPT;
[[nodiscard]] void* alignedRealloc(void* ptr, std::size_t alignment, std::size_t size) MIJIN_NOEXCEPT;
void alignedFree(void* ptr);
[[nodiscard]] std::uint64_t getCPUTicks() MIJIN_NOEXCEPT;
[[nodiscard]] std::uint64_t getCPUTicksPerSecond() MIJIN_NOEXCEPT;
SharedLibrary::~SharedLibrary() MIJIN_NOEXCEPT
{
close();