99 lines
2.4 KiB
C++
99 lines
2.4 KiB
C++
#ifndef OS_IMPL_LINUX_CPP
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#define OS_IMPL_LINUX_CPP
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#include "os.h"
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <unistd.h>
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void *os_alloc(size_t capacity) {
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return mmap(0, capacity, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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}
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void os_commit(void *ptr) {
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}
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void os_decommit(void *ptr) {
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}
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void os_free(void *ptr, size_t size) {
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int err = munmap(ptr, size);
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Assert(err != -1);
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}
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string os_readEntireFile(Arena *arena, string filename) {
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Scratch temp = scratchStart(&arena, 1);
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FILE *input = fopen(cstring(temp.arena, filename), "r");
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string readBuffer;
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if (input) {
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struct stat st;
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stat((char *)filename.str, &st);
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size_t fsize = st.st_size;
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readBuffer = PushString(arena, fsize);
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fread(readBuffer.str, sizeof(byte), readBuffer.length, input);
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fclose(input);
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} else {
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readBuffer = PushString(arena, 0);
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}
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scratchEnd(temp);
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return readBuffer;
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}
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bool os_writeEntireFile(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
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Scratch temp = scratchStart(&arena, 1);
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bool result = false;
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FILE *output = fopen(cstring(temp.arena, filename), "w");
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if (output) {
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fwrite(contents, sizeof(byte), contentsLength, output);
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fclose(output);
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result = true;
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}
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scratchEnd(temp);
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return result;
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}
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bool os_fileAppend(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
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Scratch temp = scratchStart(&arena, 1);
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bool result = false;
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FILE *output = fopen(cstring(temp.arena, filename), "a");
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if (output) {
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fwrite(contents, sizeof(byte), contentsLength, output);
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fclose(output);
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result = true;
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}
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scratchEnd(temp);
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return result;
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}
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void os_log(LogTarget target, const char *fmt, va_list argList) {
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Scratch temp = scratchStart(0, 0);
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string result = strPrintfv(temp.arena, fmt, argList);
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// TODO(djledda): finish implementation without cstdlib
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switch (target) {
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case LogTarget_stdin:
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write(0, (const void *)result.str, result.length);
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break;
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case LogTarget_stderr:
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fflush(stderr);
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write(2, (const void *)result.str, result.length);
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break;
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case LogTarget_stdout:
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default:
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fflush(stdout);
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write(1, (const void *)result.str, result.length);
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break;
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}
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scratchEnd(temp);
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}
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#endif
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