117 lines
3.5 KiB
C++
117 lines
3.5 KiB
C++
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/* ========================================================================
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(C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Please see https://computerenhance.com for more information
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======================================================================== */
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/* ========================================================================
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LISTING 104
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======================================================================== */
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/* NOTE(casey): _CRT_SECURE_NO_WARNINGS is here because otherwise we cannot
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call fopen(). If we replace fopen() with fopen_s() to avoid the warning,
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then the code doesn't compile on Linux anymore, since fopen_s() does not
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exist there.
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What exactly the CRT maintainers were thinking when they made this choice,
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I have no idea. */
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#define _CRT_SECURE_NO_WARNINGS
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <math.h>
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#include <sys/stat.h>
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typedef uint8_t u8;
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typedef uint32_t u32;
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typedef uint64_t u64;
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typedef int32_t b32;
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typedef float f32;
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typedef double f64;
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#define ArrayCount(Array) (sizeof(Array)/sizeof((Array)[0]))
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#include "listing_0068_buffer.cpp"
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#include "listing_0074_platform_metrics.cpp"
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#include "listing_0103_repetition_tester.cpp"
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#include "listing_0102_read_overhead_test.cpp"
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struct test_function
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{
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char const *Name;
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read_overhead_test_func *Func;
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};
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test_function TestFunctions[] =
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{
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{"fread", ReadViaFRead},
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{"_read", ReadViaRead},
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{"ReadFile", ReadViaReadFile},
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};
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int main(int ArgCount, char **Args)
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{
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// NOTE(casey): Since we do not use these functions in this particular build, we reference their pointers
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// here to prevent the compiler from complaining about "unused functions".
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(void)&IsInBounds;
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(void)&AreEqual;
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u64 CPUTimerFreq = EstimateCPUTimerFreq();
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if(ArgCount == 2)
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{
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char *FileName = Args[1];
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#if _WIN32
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struct __stat64 Stat;
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_stat64(FileName, &Stat);
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#else
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struct stat Stat;
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stat(FileName, &Stat);
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#endif
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read_parameters Params = {};
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Params.Dest = AllocateBuffer(Stat.st_size);
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Params.FileName = FileName;
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if(Params.Dest.Count > 0)
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{
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repetition_tester Testers[ArrayCount(TestFunctions)] = {};
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for(;;)
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{
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for(u32 FuncIndex = 0; FuncIndex < ArrayCount(TestFunctions); ++FuncIndex)
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{
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repetition_tester *Tester = Testers + FuncIndex;
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test_function TestFunc = TestFunctions[FuncIndex];
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printf("\n--- %s ---\n", TestFunc.Name);
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NewTestWave(Tester, Params.Dest.Count, CPUTimerFreq);
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TestFunc.Func(Tester, &Params);
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}
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}
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// NOTE(casey): We would normally call this here, but we can't because the compiler will complain about "unreachable code".
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// So instead we just reference the pointer to prevent the compiler complaining about unused function :(
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(void)&FreeBuffer;
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}
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else
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{
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fprintf(stderr, "ERROR: Test data size must be non-zero\n");
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}
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}
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else
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{
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fprintf(stderr, "Usage: %s [existing filename]\n", Args[0]);
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}
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return 0;
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}
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