src/errors.c

   1 #include "common.h"
   2 #include "thread-utils.h" /* for GIT_TLS */
   3
   4 #if defined(GIT_TLS)
   5 /* compile-time constant initialization required */
   6 GIT_TLS int git_errno = 0;
   7
   8 #elif defined(GIT_HAS_PTHREAD)
   9
  10 static pthread_key_t errno_key;
  11
  12 static void init_errno(void) __attribute__((constructor));
  13 static void init_errno(void)
  14 {
  15         pthread_key_create(&errno_key, free);
  16 }
  17
  18 int *git__errno_storage(void)
  19 {
  20         int *e = pthread_getspecific(errno_key);
  21         if (!e) {
  22 #undef calloc
  23                 e = calloc(1, sizeof(*e));
  24 #define calloc(a,b) GIT__FORBID_MALLOC
  25                 pthread_setspecific(errno_key, e);
  26         }
  27         return e;
  28 }
  29
  30 #endif
  31
  32 static struct {
  33         int num;
  34         const char *str;
  35 } error_codes[] = {
  36         { GIT_ENOTOID, "Not a git oid" },
  37         { GIT_ENOTFOUND, "Object does not exist in the scope searched" },
  38         { GIT_ENOMEM, "Not enough space" },
  39 };
  40
  41 const char *git_strerror(int num)
  42 {
  43         size_t i;
  44
  45         if (num == GIT_EOSERR)
  46                 return strerror(errno);
  47         for (i = 0; i < ARRAY_SIZE(error_codes); i++)
  48                 if (num == error_codes[i].num)
  49                         return error_codes[i].str;
  50
  51         return "Unknown error";
  52 }