diff options
Diffstat (limited to 'sysdeps/hurd/include/hurd/fd.h')
| -rw-r--r-- | sysdeps/hurd/include/hurd/fd.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sysdeps/hurd/include/hurd/fd.h b/sysdeps/hurd/include/hurd/fd.h index 1f3ac380a0..3a6cdc7f36 100644 --- a/sysdeps/hurd/include/hurd/fd.h +++ b/sysdeps/hurd/include/hurd/fd.h @@ -1,6 +1,47 @@ #ifndef _HURD_FD_H #include_next <hurd/fd.h> + #ifndef _ISOMAC +#include <libc-lock.h> + +struct _hurd_fd_port_use_data + { + struct hurd_fd *d; + struct hurd_userlink ulink, ctty_ulink; + io_t port, ctty; + }; + +extern void _hurd_fd_port_use_cleanup (void *arg); + +/* Like HURD_DPORT_USE, but cleans fd on cancel. */ +#define HURD_DPORT_USE_CANCEL(fd, expr) \ + HURD_FD_USE ((fd), HURD_FD_PORT_USE_CANCEL (descriptor, (expr))) + +/* Like HURD_FD_PORT_USE, but cleans fd on cancel. */ +#define HURD_FD_PORT_USE_CANCEL(fd, expr) \ + ({ error_t __result; \ + void *__crit = _hurd_critical_section_lock (); \ + struct _hurd_fd_port_use_data __d; \ + io_t port, ctty; \ + __d.d = (fd); \ + __spin_lock (&__d.d->port.lock); \ + if (__d.d->port.port == MACH_PORT_NULL) \ + { \ + __spin_unlock (&__d.d->port.lock); \ + _hurd_critical_section_unlock (__crit); \ + __result = EBADF; \ + } \ + else \ + { \ + __d.ctty = ctty = _hurd_port_get (&__d.d->ctty, &__d.ctty_ulink); \ + __d.port = port = _hurd_port_locked_get (&__d.d->port, &__d.ulink); \ + __libc_cleanup_push (_hurd_fd_port_use_cleanup, &__d); \ + _hurd_critical_section_unlock (__crit); \ + __result = (expr); \ + __libc_cleanup_pop (1); \ + } \ + __result; }) + libc_hidden_proto (_hurd_intern_fd) libc_hidden_proto (_hurd_fd_error) libc_hidden_proto (_hurd_fd_error_signal) |