diff options
Diffstat (limited to 'lib/System/Unix/Unix.h')
-rw-r--r-- | lib/System/Unix/Unix.h | 63 |
1 files changed, 46 insertions, 17 deletions
diff --git a/lib/System/Unix/Unix.h b/lib/System/Unix/Unix.h index 32609f2..4ef3896 100644 --- a/lib/System/Unix/Unix.h +++ b/lib/System/Unix/Unix.h @@ -66,28 +66,57 @@ # define WIFEXITED(stat_val) (((stat_val) & 255) == 0) #endif +inline bool GetErrno(const std::string &prefix, std::string *ErrDest, + int errnum = -1) { + char buffer[MAXPATHLEN]; + + if (ErrDest == 0) return true; + + buffer[0] = 0; + if (errnum == -1) + errnum = errno; +#ifdef HAVE_STRERROR_R + // strerror_r is thread-safe. + if (errnum) + strerror_r(errnum, buffer, MAXPATHLEN-1); +#elif HAVE_STRERROR + // Copy the thread un-safe result of strerror into + // the buffer as fast as possible to minimize impact + // of collision of strerror in multiple threads. + if (errnum) + strncpy(buffer, strerror(errnum), MAXPATHLEN-1); + buffer[MAXPATHLEN-1] = 0; +#else + // Strange that this system doesn't even have strerror + // but, oh well, just use a generic message + sprintf(buffer, "Error #%d", errnum); +#endif + *ErrDest = prefix + ": " + buffer; + return true; +} + inline void ThrowErrno(const std::string& prefix, int errnum = -1) { - char buffer[MAXPATHLEN]; - buffer[0] = 0; - if (errnum == -1) - errnum = errno; + char buffer[MAXPATHLEN]; + buffer[0] = 0; + if (errnum == -1) + errnum = errno; #ifdef HAVE_STRERROR_R - // strerror_r is thread-safe. - if (errnum) - strerror_r(errnum,buffer,MAXPATHLEN-1); + // strerror_r is thread-safe. + if (errnum) + strerror_r(errnum,buffer,MAXPATHLEN-1); #elif HAVE_STRERROR - // Copy the thread un-safe result of strerror into - // the buffer as fast as possible to minimize impact - // of collision of strerror in multiple threads. - if (errnum) - strncpy(buffer,strerror(errnum),MAXPATHLEN-1); - buffer[MAXPATHLEN-1] = 0; + // Copy the thread un-safe result of strerror into + // the buffer as fast as possible to minimize impact + // of collision of strerror in multiple threads. + if (errnum) + strncpy(buffer,strerror(errnum),MAXPATHLEN-1); + buffer[MAXPATHLEN-1] = 0; #else - // Strange that this system doesn't even have strerror - // but, oh well, just use a generic message - sprintf(buffer, "Error #%d", errnum); + // Strange that this system doesn't even have strerror + // but, oh well, just use a generic message + sprintf(buffer, "Error #%d", errnum); #endif - throw prefix + ": " + buffer; + throw prefix + ": " + buffer; } #endif |