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chore(util/file_lock): style

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Leonardo de Moura 2015-12-14 10:20:33 -08:00
parent 2185ee7e95
commit 521657914c
1 changed files with 17 additions and 17 deletions
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34
src/util/file_lock.cpp
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@ -17,20 +17,20 @@ Author: Leonardo de Moura
#define LOCK_EX 2 /* exclusive lock */
#define LOCK_NB 4 /* don't block when locking */
#define LOCK_UN 8 /* unlock */
static BOOL lock(HANDLE h, int non_blocking, int exclusive) {
DWORD lower, upper;
OVERLAPPED ovlp;
int flags = 0;
lower = GetFileSize(h, &upper);
memset (&ovlp, 0, sizeof(ovlp));
if (non_blocking)
flags |= LOCKFILE_FAIL_IMMEDIATELY;
flags |= LOCKFILE_FAIL_IMMEDIATELY;
if (exclusive)
flags |= LOCKFILE_EXCLUSIVE_LOCK;
flags |= LOCKFILE_EXCLUSIVE_LOCK;
return LockFileEx(h, flags, 0, lower, upper, &ovlp);
}
@ -44,25 +44,25 @@ int flock(int fd, int op) {
HANDLE h = (HANDLE)_get_osfhandle(fd);
DWORD res;
int non_blocking;
if (h == INVALID_HANDLE_VALUE)
return -1;
return -1;
non_blocking = op & LOCK_NB;
op &= ~LOCK_NB;
switch (op) {
case LOCK_SH:
res = lock(h, non_blocking, 0);
break;
res = lock(h, non_blocking, 0);
break;
case LOCK_EX:
res = lock(h, non_blocking, 1);
break;
res = lock(h, non_blocking, 1);
break;
case LOCK_UN:
res = unlock(h);
break;
res = unlock(h);
break;
default:
return -1;
return -1;
}
return !res ? -1 : 0;
}