SoW-2019-0002: Dynamic Snapshot
[lttng-tools.git] / tests / utils / utils.c
index 7aa8667d4f4520891d4b5d013ae752641897dde8..46ec61cd092397ea42fb3adbb63e78186de7d20b 100644 (file)
@@ -1,29 +1,25 @@
 /*
- * Copyright (C) 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation; version 2.1 of the License.
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * This library is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
-#include <stdint.h>
-#include <common/compat/time.h>
 #include <assert.h>
-#include <unistd.h>
-#include <stdio.h>
+#include <common/compat/time.h>
+#include <common/time.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
 
-#define NSEC_PER_SEC 1000000000ULL
-#define NSEC_PER_USEC 1000ULL
+#include "utils.h"
 
 static inline
 int64_t elapsed_time_ns(struct timespec *t1, struct timespec *t2)
@@ -57,7 +53,7 @@ int usleep_safe(useconds_t usec)
                        goto end;
                }
 
-               ret = clock_gettime(CLOCK_MONOTONIC, &t2);
+               ret = lttng_clock_gettime(CLOCK_MONOTONIC, &t2);
                if (ret) {
                        perror("clock_gettime");
                        goto end;
@@ -68,3 +64,61 @@ int usleep_safe(useconds_t usec)
 end:
        return ret;
 }
+
+int create_file(const char *path)
+{
+       int ret;
+
+       if (!path) {
+               return -1;
+       }
+
+       ret = creat(path, S_IRWXU);
+       if (ret < 0) {
+               perror("creat");
+               return -1;
+       }
+
+       ret = close(ret);
+       if (ret < 0) {
+               perror("close");
+               return -1;
+       }
+
+       return 0;
+}
+
+int wait_on_file(const char *path)
+{
+       int ret;
+       struct stat buf;
+
+       if (!path) {
+               return -1;
+       }
+
+       for (;;) {
+               ret = stat(path, &buf);
+               if (ret == -1 && errno == ENOENT) {
+                       ret = poll(NULL, 0, 10);        /* 10 ms delay */
+                       /* Should return 0 everytime */
+                       if (ret) {
+                               if (ret < 0) {
+                                       perror("perror");
+                               } else {
+                                       fprintf(stderr,
+                                               "poll return value is larger than zero\n");
+                               }
+                               return -1;
+                       }
+                       continue;                       /* retry */
+               }
+               if (ret) {
+                       perror("stat");
+                       return -1;
+               }
+               break;  /* found */
+       }
+
+       return 0;
+}
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