選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。

os_linux.cpp 2.4 KiB

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  1. #ifndef OS_IMPL_LINUX_CPP
  2. #define OS_IMPL_LINUX_CPP
  3. #include "os.h"
  4. #include <sys/mman.h>
  5. #include <sys/stat.h>
  6. #include <unistd.h>
  7. void *os_alloc(size_t capacity) {
  8. return mmap(0, capacity, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  9. }
  10. void os_commit(void *ptr) {
  11. }
  12. void os_decommit(void *ptr) {
  13. }
  14. void os_free(void *ptr, size_t size) {
  15. int err = munmap(ptr, size);
  16. Assert(err != -1);
  17. }
  18. string os_readEntireFile(Arena *arena, string filename) {
  19. Scratch temp = scratchStart(&arena, 1);
  20. FILE *input = fopen(cstring(temp.arena, filename), "r");
  21. string readBuffer;
  22. if (input) {
  23. struct stat st;
  24. stat((char *)filename.str, &st);
  25. size_t fsize = st.st_size;
  26. readBuffer = PushString(arena, fsize);
  27. fread(readBuffer.str, sizeof(byte), readBuffer.length, input);
  28. fclose(input);
  29. } else {
  30. readBuffer = PushString(arena, 0);
  31. }
  32. scratchEnd(temp);
  33. return readBuffer;
  34. }
  35. bool os_writeEntireFile(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
  36. Scratch temp = scratchStart(&arena, 1);
  37. bool result = false;
  38. FILE *output = fopen(cstring(temp.arena, filename), "w");
  39. if (output) {
  40. fwrite(contents, sizeof(byte), contentsLength, output);
  41. fclose(output);
  42. result = true;
  43. }
  44. scratchEnd(temp);
  45. return result;
  46. }
  47. bool os_fileAppend(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
  48. Scratch temp = scratchStart(&arena, 1);
  49. bool result = false;
  50. FILE *output = fopen(cstring(temp.arena, filename), "a");
  51. if (output) {
  52. fwrite(contents, sizeof(byte), contentsLength, output);
  53. fclose(output);
  54. result = true;
  55. }
  56. scratchEnd(temp);
  57. return result;
  58. }
  59. void os_log(LogTarget target, const char *fmt, va_list argList) {
  60. Scratch temp = scratchStart(0, 0);
  61. string result = strPrintfv(temp.arena, fmt, argList);
  62. // TODO(djledda): finish implementation without cstdlib
  63. switch (target) {
  64. case LogTarget_stdin:
  65. write(0, (const void *)result.str, result.length);
  66. break;
  67. case LogTarget_stderr:
  68. fflush(stderr);
  69. write(2, (const void *)result.str, result.length);
  70. break;
  71. case LogTarget_stdout:
  72. default:
  73. fflush(stdout);
  74. write(1, (const void *)result.str, result.length);
  75. break;
  76. }
  77. scratchEnd(temp);
  78. }
  79. #endif