Classify processes from sessions into cgroups

[elogind.git] / src / shared / barrier.c

diff --git a/src/shared/barrier.c b/src/shared/barrier.c
index 4a5544de27d309f0593c34d5fc4e1ccba06d0985..436ba9598910a861b59312effa26622f7cdee1c8 100644 (file)
--- a/src/shared/barrier.c
+++ b/src/shared/barrier.c
@@ -21,13 +21,10 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <limits.h>
 #include <poll.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <sys/eventfd.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -112,15 +109,24 @@
  * Returns: 0 on success, negative error code on failure.
  */
 int barrier_create(Barrier *b) {
+        _cleanup_(barrier_destroyp) Barrier *staging = b;
+        int r;
+
         assert(b);
 
-        if ((b->me = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK)) < 0 ||
-            (b->them = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK)) < 0 ||
-            pipe2(b->pipe, O_CLOEXEC | O_NONBLOCK) < 0) {
-                barrier_destroy(b);
+        b->me = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
+        if (b->me < 0)
+                return -errno;
+
+        b->them = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
+        if (b->them < 0)
+                return -errno;
+
+        r = pipe2(b->pipe, O_CLOEXEC | O_NONBLOCK);
+        if (r < 0)
                 return -errno;
-        }
 
+        staging = NULL;
         return 0;
 }
 
@@ -132,7 +138,7 @@ int barrier_create(Barrier *b) {
  * barrier_create(). The object is released and reset to invalid
  * state. Therefore, it is safe to call barrier_destroy() multiple
  * times or even if barrier_create() failed. However, barrier must be
- * always initalized with BARRIER_NULL.
+ * always initialized with BARRIER_NULL.
  *
  * If @b is NULL, this is a no-op.
  */
@@ -169,7 +175,7 @@ void barrier_set_role(Barrier *b, unsigned int role) {
         assert(b);
         assert(role == BARRIER_PARENT || role == BARRIER_CHILD);
         /* make sure this is only called once */
-        assert(b->pipe[1] >= 0 && b->pipe[1] >= 0);
+        assert(b->pipe[0] >= 0 && b->pipe[1] >= 0);
 
         if (role == BARRIER_PARENT)
                 b->pipe[1] = safe_close(b->pipe[1]);