Added getCPUTicks() and getCPUTicksPerSeconds() functions.

source/mijin/debug/assert.hpp

@@ -19,7 +19,6 @@
 #pragma comment(lib, "kernel32")
 extern "C" __declspec(dllimport) void __stdcall DebugBreak();
 #define MIJIN_TRAP() DebugBreak()
-#define MIJIN_FUNC() __FUNCSIG__
 #else // _WIN32
 #include <unistd.h>
 #define MIJIN_TRAP()                            \
@@ -34,7 +33,6 @@ extern "C" __declspec(dllimport) void __stdcall DebugBreak();
         : "rcx", "r11", "memory"                \
     );                                          \
 }
-#define MIJIN_FUNC() "" // TODO: __PRETTY_FUNCTION__ is not working for some reason -.-
 #endif // !_WIN32
 
 namespace mijin

source/mijin/logging/logger.hpp

@@ -11,6 +11,7 @@
 #include <vector>
 #include "../internal/common.hpp"
 #include "../util/annot.hpp"
+#include "../util/iterators.hpp"
 
 namespace mijin
 {
@@ -126,11 +127,8 @@ public:
     {}
 
     BaseLogger(const BaseLogger&) = default;
-
     BaseLogger(BaseLogger&&) = default;
-
     BaseLogger& operator=(const BaseLogger&) = default;
-
     BaseLogger& operator=(BaseLogger&&) = default;
 
     void addSink(sink_t& sink)
@@ -158,12 +156,28 @@ public:
 
     template<typename... TArgs>
     void log(const level_t& level, const channel_t& channel, std::source_location sourceLocation,
-             std::basic_format_string<char_t, std::type_identity_t<TArgs>...> fmt, TArgs&& ... args) const
+             std::basic_format_string<char_t, std::type_identity_t<TArgs>...> fmt, TArgs&& ... args) const MIJIN_NOEXCEPT
-             MIJIN_NOEXCEPT_IF(noexcept(std::declval<allocator_t>().allocate(1)))
     {
-        string_t buffer(allocator_t(mSinks.get_allocator()));
+        // TODO: make the logger use a traits struct to make this adjustable
-        std::format_to(std::back_inserter(buffer), fmt, std::forward<TArgs>(args)...);
+        static constexpr std::size_t BUFFER_SIZE = 256;
-        log(level, channel, std::move(sourceLocation), buffer.c_str());
+        std::array<char_t, BUFFER_SIZE> buffer;
+
+        // first try to write into a buffer on the stack
+        FixedArrayOutputIterator itAfter = std::format_to(FixedArrayOutputIterator(buffer), fmt, std::forward<TArgs>(args)...);
+        *itAfter = '\0';
+        ++itAfter;
+        if (!itAfter.didOverflow())
+        {
+            log(level, channel, std::move(sourceLocation), buffer.data());
+            return;
+        }
+
+        // if that didn't work, allocate more space
+        const std::size_t newBufferSize = itAfter.getCounter();
+        char_t* newBuffer = static_cast<char_t*>(alloca(newBufferSize * sizeof(char_t)));
+        const std::format_to_n_result result = std::format_to_n(newBuffer, newBufferSize - 1, fmt, std::forward<TArgs>(args)...);
+        *result.out = '\0';
+        log(level, channel, std::move(sourceLocation), newBuffer);
     }
 };
 

source/mijin/util/common_macros.hpp

@@ -4,8 +4,18 @@
 #if !defined(MIJIN_UTIL_COMMON_MACROS_HPP_INCLUDED)
 #define MIJIN_UTIL_COMMON_MACROS_HPP_INCLUDED 1
 
+#include "../detect.hpp"
+
 #define MIJIN_CONCAT_DETAIL(a, b) a ## b
 #define MIJIN_CONCAT(a, b) MIJIN_CONCAT_DETAIL(a, b)
 #define MIJIN_CONCAT3(a, b, c) MIJIN_CONCAT(a, MIJIN_CONCAT(b, c))
 
+#if MIJIN_COMPILER == MIJIN_COMPILER_GCC || MIJIN_COMPILER == MIJIN_COMPILER_CLANG
+#define MIJIN_FUNCNAME() __PRETTY_FUNCTION__
+#elif MIJIN_COMPILER == MIJIN_COMPILER_MSVC
+#define MIJIN_FUNCNAME() __FUNCSIG__
+#else
+#define MIJIN_FUNCNAME() __func__
+#endif
+
 #endif // defined(MIJIN_UTIL_COMMON_MACROS_HPP_INCLUDED)

source/mijin/util/iterators.hpp

@@ -13,6 +13,7 @@
 #include <variant>
 #include "../container/optional.hpp"
 #include "../internal/common.hpp"
+#include "../util/annot.hpp"
 
 namespace mijin
 {
@@ -855,6 +856,64 @@ TAs collect(TIterable&& iterable)
     return TAs(iterable.begin(), iterable.end());
 }
 
+template<typename TEle, std::size_t numEles>
+class FixedArrayOutputIterator
+{
+public:
+    using array_t = std::array<TEle, numEles>;
+    using difference_type = std::ptrdiff_t;
+    using value_type = TEle;
+    using pointer = value_type*;
+    using reference = value_type&;
+
+    static constexpr std::size_t NUM_ELES = numEles;
+private:
+    not_null_t<array_t*> array_;
+    std::size_t counter_ = 0;
+public:
+    constexpr explicit FixedArrayOutputIterator(array_t& array) MIJIN_NOEXCEPT : array_(&array) {}
+    constexpr explicit FixedArrayOutputIterator(array_t& array, array_t::iterator pos) MIJIN_NOEXCEPT
+            : array_(&array), counter_(static_cast<std::size_t>(pos - array.begin())) {}
+    constexpr FixedArrayOutputIterator(const FixedArrayOutputIterator&) noexcept = default;
+
+    constexpr FixedArrayOutputIterator& operator=(const FixedArrayOutputIterator&) noexcept = default;
+
+    [[nodiscard]]
+    constexpr std::size_t getCounter() const MIJIN_NOEXCEPT
+    {
+        return counter_;
+    }
+
+    [[nodiscard]]
+    constexpr bool didOverflow() const MIJIN_NOEXCEPT
+    {
+        return counter_ >= NUM_ELES;
+    }
+
+    constexpr reference operator*() const MIJIN_NOEXCEPT
+    {
+        static TEle dummy_; // returned when we're at the end of the array
+        if (counter_ < NUM_ELES) {
+            return array_->at(counter_);
+        }
+        return dummy_;
+    }
+
+    constexpr FixedArrayOutputIterator& operator++() MIJIN_NOEXCEPT
+    {
+        ++counter_;
+        return *this;
+    }
+
+    constexpr FixedArrayOutputIterator operator++(int) const MIJIN_NOEXCEPT
+    {
+        FixedArrayOutputIterator copy(*this);
+        ++copy;
+        return copy;
+    }
+};
+static_assert(std::output_iterator<FixedArrayOutputIterator<int, 1>, int>);
+
 namespace pipe
 {
 template<typename T>
@@ -973,7 +1032,7 @@ auto operator|(TIterable&& iterable, Xth<idx>)
 {
     return map(std::forward<TIterable>(iterable), [](auto&& element) { return std::get<idx>(element); } );
 }
-}
+} // namespace pipe
 } // namespace mijin
 
 #endif // MIJIN_UTIL_ITERATORS_HPP_INCLUDED

source/mijin/util/os.cpp

@@ -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

source/mijin/util/os.hpp

@@ -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();