int sp_lockfile(spfile *f, char *path)
{
f->creat = 0;
f->fd = open(path, O_CREAT|O_WRONLY, 0600);
if (spunlikely(f->fd == -1))
return -1;
f->file = sp_strdup(f->a, path);
if (spunlikely(f->file == NULL)) {
close(f->fd);
f->fd = -1;
return -1;
}
struct flock l;
memset(&l, 0, sizeof(l));
l.l_whence = SEEK_SET;
l.l_start = 0;
l.l_len = 0;
l.l_type = F_WRLCK;
int rc = fcntl(f->fd, F_SETLK, &l);
if (spunlikely(rc == -1)) {
sp_fileclose(f);
return 1;
}
return 0;
}
int sp_mapclose(spfile *f)
{
int rc = sp_mapcut(f);
if (spunlikely(rc == -1))
return -1;
if (f->map) {
rc = sp_unmap(f);
if (spunlikely(rc == -1))
return -1;
}
return sp_fileclose(f);
}
int sp_lockfile(spfile *f, char *path)
{
f->creat = 0;
#ifdef _MSC_VER
f->fd = sp_win_openfileshare(path, O_CREAT | O_WRONLY, 0);
if (f->fd == -1 && GetLastError() == ERROR_SHARING_VIOLATION)
return 1; // already locked
#else
f->fd = open(path, O_CREAT | O_WRONLY, 0600);
#endif
if (spunlikely(f->fd == -1))
return -1;
f->file = sp_strdup(f->a, path);
if (spunlikely(f->file == NULL)) {
close(f->fd);
f->fd = -1;
return -1;
}
#ifdef _MSC_VER
int rc = LockFile((HANDLE)_get_osfhandle(f->fd), 0, 0, 0xffffffff, 0xffffffff);
if (spunlikely(rc == 0)) {
sp_fileclose(f);
return 1;
}
return 0;
#else
struct flock l;
memset(&l, 0, sizeof(l));
l.l_whence = SEEK_SET;
l.l_start = 0;
l.l_len = 0;
l.l_type = F_WRLCK;
int rc = fcntl(f->fd, F_SETLK, &l);
if (spunlikely(rc == -1)) {
sp_fileclose(f);
return 1;
}
return 0;
#endif
}
int sp_unlockfile(spfile *f)
{
if (spunlikely(f->fd == -1))
return 0;
struct flock l;
memset(&l, 0, sizeof(l));
l.l_whence = SEEK_SET;
l.l_start = 0;
l.l_len = 0;
l.l_type = F_UNLCK;
fcntl(f->fd, F_SETLK, &l);
unlink(f->file);
return sp_fileclose(f);
}
int sp_unlockfile(spfile *f)
{
if (spunlikely(f->fd == -1))
return 0;
#ifdef _MSC_VER
UnlockFile((HANDLE)_get_osfhandle(f->fd), 0, 0, 0xffffffff, 0xffffffff);
#else
struct flock l;
memset(&l, 0, sizeof(l));
l.l_whence = SEEK_SET;
l.l_start = 0;
l.l_len = 0;
l.l_type = F_UNLCK;
fcntl(f->fd, F_SETLK, &l);
#endif
unlink(f->file);
return sp_fileclose(f);
}
int sp_logclose(spfile *f) {
return sp_fileclose(f);
}