diff options
Diffstat (limited to 'lib/libc/stdio/fwrite.c')
| -rw-r--r-- | lib/libc/stdio/fwrite.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/libc/stdio/fwrite.c b/lib/libc/stdio/fwrite.c index dbc2e978d7d0..7efb0ac4e277 100644 --- a/lib/libc/stdio/fwrite.c +++ b/lib/libc/stdio/fwrite.c @@ -41,6 +41,10 @@ static char sccsid[] = "@(#)fwrite.c 8.1 (Berkeley) 6/4/93"; #include <stdio.h> #include "local.h" #include "fvwrite.h" +#ifdef _THREAD_SAFE +#include <pthread.h> +#include "pthread_private.h" +#endif /* * Write `count' objects (each size `size') from memory to the given file. @@ -61,12 +65,18 @@ fwrite(buf, size, count, fp) uio.uio_iov = &iov; uio.uio_iovcnt = 1; +#ifdef _THREAD_SAFE + _thread_flockfile(fp,__FILE__,__LINE__); +#endif /* * The usual case is success (__sfvwrite returns 0); * skip the divide if this happens, since divides are * generally slow and since this occurs whenever size==0. */ - if (__sfvwrite(fp, &uio) == 0) - return (count); - return ((n - uio.uio_resid) / size); + if (__sfvwrite(fp, &uio) != 0) + count = (n - uio.uio_resid) / size; +#ifdef _THREAD_SAFE + _thread_funlockfile(fp); +#endif + return (count); } |