163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 29.03.2017
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*
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* Really basic profiling primitives. (not meant to stay for long)
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*
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*/
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// TOP
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#if !defined(FRED_PROFILE_H)
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#define FRED_PROFILE_H
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#if FRED_INTERNAL && IS_MSVC
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#include <intrin.h>
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#include <stdio.h>
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struct Profile_Group{
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char name[104];
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u64 cycle_start;
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u64 cycle_count;
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void *end;
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};
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struct Profile{
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u8 *buffer;
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u32 pos, max;
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Profile_Group *stack[64];
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u32 stack_top;
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};
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global Profile global_profile = {0};
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internal Profile_Group*
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push_group(char *name){
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Profile_Group *result = 0;
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if (global_profile.pos + sizeof(Profile_Group) <= global_profile.max){
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result = (Profile_Group*)(global_profile.buffer + global_profile.pos);
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global_profile.pos += sizeof(Profile_Group);
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u32 i = 0;
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for (; name[i] && i < sizeof(result->name)-1; ++i){
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result->name[i] = name[i];
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}
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result->name[i] = 0;
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result->cycle_start = __rdtsc();
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}
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return(result);
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}
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internal void
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profile_init(void *mem, u32 max){
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global_profile.buffer = (u8*)mem;
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global_profile.max = max;
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}
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internal void
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profile_begin_group(char *name){
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u32 stack_pos = global_profile.stack_top;
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if (stack_pos < ArrayCount(global_profile.stack)){
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global_profile.stack[stack_pos] = push_group(name);
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Assert(global_profile.stack[stack_pos] != 0);
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++global_profile.stack_top;
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}
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}
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internal void
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profile_end_group(){
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Assert(global_profile.stack_top > 0);
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u32 stack_pos = --global_profile.stack_top;
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if (stack_pos < ArrayCount(global_profile.stack)){
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Profile_Group *group = global_profile.stack[stack_pos];
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Assert(group != 0);
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group->cycle_count = __rdtsc() - group->cycle_start;
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group->end = global_profile.buffer + global_profile.pos;
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}
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}
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internal void
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profile_begin_frame(){
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global_profile.pos = 0;
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global_profile.stack_top = 0;
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profile_begin_group("*frame*");
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}
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internal void
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profile_end_frame(char *filename){
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profile_end_group();
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Assert(global_profile.stack_top == 0);
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FILE *file = fopen(filename, "ab");
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Assert(file != 0);
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fwrite(&global_profile.buffer, 8, 1, file);
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Profile_Group *first_group = (Profile_Group*)global_profile.buffer;
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fwrite(&first_group->end, 8, 1, file);
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fwrite(global_profile.buffer, 1, global_profile.pos, file);
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fclose(file);
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}
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internal Profile_Group*
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profile_begin_resumable(char *name){
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Profile_Group *result = push_group(name);
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Assert(result != 0);
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result->cycle_count = 0;
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result->end = result + 1;
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return(result);
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}
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struct profile_scope{
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profile_scope(char *name){
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profile_begin_group(name);
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}
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~profile_scope(){
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profile_end_group();
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}
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};
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#define PRFL_INIT(m,s) profile_init(m,s)
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#define PRFL_BEGIN_FRAME() profile_begin_frame()
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#define PRFL_END_FRAME(n) profile_end_frame(n)
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#define PRFL_BEGIN_GROUP(n) profile_begin_group(#n)
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#define PRFL_END_GROUP() profile_end_group()
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#define PRFL_SCOPE_GROUP(n) profile_scope SCOPE_##n(#n)
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#define PRFL_FUNC_GROUP() profile_scope SCOPE_FUNC(__FUNCTION__)
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#define PRFL_BEGIN_RESUMABLE(n) Profile_Group *PRFLGRP_##n = profile_begin_resumable(#n)
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#define PRFL_START_RESUMABLE(n) PRFLGRP_##n->cycle_start = __rdtsc()
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#define PRFL_STOP_RESUMABLE(n) PRFLGRP_##n->cycle_count += __rdtsc() - PRFLGRP_##n->cycle_start
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#define PRFL_END_RESUMABLE(n)
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#else
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#define PRFL_INIT(m,s)
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#define PRFL_BEGIN_FRAME()
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#define PRFL_END_FRAME(n)
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#define PRFL_BEGIN_GROUP(n)
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#define PRFL_END_GROUP()
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#define PRFL_SCOPE_GROUP(n)
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#define PRFL_FUNC_GROUP()
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#define PRFL_BEGIN_RESUMABLE(n)
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#define PRFL_START_RESUMABLE(n)
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#define PRFL_STOP_RESUMABLE(n)
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#define PRFL_END_RESUMABLE(n)
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#endif
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#endif
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// BOTTOM
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