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For Bug 543: 

Allow the ThrowErrno function to optionally accept an error number
parameter so that callers can specify the error number to be used.

llvm-svn: 21384
This commit is contained in:
Reid Spencer 2005-04-21 02:30:32 +00:00
parent 2f72bafb60
commit b02566dc1c
1 changed files with 8 additions and 6 deletions
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14
llvm/lib/System/Unix/Unix.h
View File

@ -66,24 +66,26 @@
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif
inline void ThrowErrno(const std::string& prefix) {
inline void ThrowErrno(const std::string& prefix, int errnum = -1) {
char buffer[MAXPATHLEN];
buffer[0] = 0;
if (errnum == -1)
errnum = errno;
#ifdef HAVE_STRERROR_R
// strerror_r is thread-safe.
if (errno)
strerror_r(errno,buffer,MAXPATHLEN-1);
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 (errno)
strncpy(buffer,strerror(errno),MAXPATHLEN-1);
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", errno);
sprintf(buffer, "Error #%d", errnum);
#endif
throw prefix + ": " + buffer;
}