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106 lines
2.8 KiB
C

#ifdef PROFILING_H
#error only include profiling.h once
#endif
#define PROFILING_H
#include <stdlib.h> // malloc the profiling buffer
#define DeferLoop(start, end) for (int _i_ = ((start), 0); _i_ == 0; _i_ += 1, (end))
#ifdef PROFILING
#define THREADLOCAL __declspec(thread)
#define PROFILING_BUFFER_SIZE (1 * 1024 * 1024)
#ifdef PROFILING_IMPL
#define SPALL_IMPLEMENTATION
#pragma warning(disable : 4996) // spall uses fopen
#include "spall.h"
#define WIN32_LEAN_AND_MEAN
#define VC_EXTRALEAN
#define NOMINMAX
#include <Windows.h>
// This is slow, if you can use RDTSC and set the multiplier in SpallInit, you'll have far better timing accuracy
double get_time_in_micros()
{
static double invfreq;
if (!invfreq)
{
LARGE_INTEGER frequency;
QueryPerformanceFrequency(&frequency);
invfreq = 1000000.0 / frequency.QuadPart;
}
LARGE_INTEGER counter;
QueryPerformanceCounter(&counter);
return counter.QuadPart * invfreq;
}
SpallProfile spall_ctx;
bool profiling = false;
THREADLOCAL SpallBuffer spall_buffer;
THREADLOCAL unsigned char *buffer_data = NULL;
THREADLOCAL uint32_t my_thread_id = 0;
void init_profiling(const char *filename)
{
spall_ctx = spall_init_file(filename, 1);
}
void init_profiling_mythread(uint32_t id)
{
profiling = true;
my_thread_id = id;
if (buffer_data != NULL)
{
__debugbreak();
}
buffer_data = malloc(PROFILING_BUFFER_SIZE);
spall_buffer = (SpallBuffer){
.length = PROFILING_BUFFER_SIZE,
.data = buffer_data,
};
spall_buffer_init(&spall_ctx, &spall_buffer);
}
void end_profiling_mythread()
{
profiling = false;
spall_buffer_quit(&spall_ctx, &spall_buffer);
free(buffer_data);
buffer_data = NULL;
}
void end_profiling()
{
spall_quit(&spall_ctx);
}
#endif // PROFILING_IMPL
#include "spall.h"
extern SpallProfile spall_ctx;
extern THREADLOCAL SpallBuffer spall_buffer;
extern THREADLOCAL uint32_t my_thread_id;
double get_time_in_micros();
void init_profiling(const char *filename);
// you can pass anything to id as long as it's different from other threads
void init_profiling_mythread(uint32_t id);
void end_profiling();
void end_profiling_mythread();
#define STRINGIZE(x) STRINGIZE2(x)
#define STRINGIZE2(x) #x
#define PROFILE_SCOPE(name) DeferLoop(profiling ? spall_buffer_begin(&spall_ctx, &spall_buffer, "L" STRINGIZE(__LINE__) " " name , sizeof("L" STRINGIZE(__LINE__) " " name) - 1, get_time_in_micros()) : (void)0, profiling ? spall_buffer_end(&spall_ctx, &spall_buffer, get_time_in_micros()) : (void)0)
#else // PROFILING
void init_profiling(const char *filename) { (void)filename; }
// you can pass anything to id as long as it's different from other threads
void init_profiling_mythread(uint32_t id) { (void)id; }
void end_profiling() {}
void end_profiling_mythread() {}
#define PROFILE_SCOPE(name) DeferLoop((void)0, (void)0) // so loop stuff in it doesn't break
#endif