X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=tests%2Futils%2Futils.cpp;fp=tests%2Futils%2Futils.cpp;h=fee74e961245d02e0322f70c86c9e7d21e33cd43;hp=0000000000000000000000000000000000000000;hb=729c1fec5976af17fded2f026725a08ef1924290;hpb=488dbb6062973d4990a33284e4717d89a893339d

diff --git a/tests/utils/utils.cpp b/tests/utils/utils.cpp
new file mode 100644
index 000000000..fee74e961
--- /dev/null
+++ b/tests/utils/utils.cpp
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <common/compat/time.h>
+#include <common/time.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>
+
+#include <common/compat/errno.h>
+#include <common/macros.h>
+
+#include "utils.h"
+
+static inline
+int64_t elapsed_time_ns(struct timespec *t1, struct timespec *t2)
+{
+	struct timespec delta;
+
+	LTTNG_ASSERT(t1 && t2);
+	delta.tv_sec = t2->tv_sec - t1->tv_sec;
+	delta.tv_nsec = t2->tv_nsec - t1->tv_nsec;
+	return ((int64_t) NSEC_PER_SEC * (int64_t) delta.tv_sec) +
+			(int64_t) delta.tv_nsec;
+}
+
+int usleep_safe(useconds_t usec)
+{
+	int ret = 0;
+	struct timespec t1, t2;
+	int64_t time_remaining_ns = (int64_t) usec * (int64_t) NSEC_PER_USEC;
+
+	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &t1);
+	if (ret) {
+		ret = -1;
+		perror("clock_gettime");
+		goto end;
+	}
+
+	while (time_remaining_ns > 0) {
+		ret = usleep(time_remaining_ns / (int64_t) NSEC_PER_USEC);
+		if (ret && errno != EINTR) {
+			perror("usleep");
+			goto end;
+		}
+
+		ret = lttng_clock_gettime(CLOCK_MONOTONIC, &t2);
+		if (ret) {
+			perror("clock_gettime");
+			goto end;
+		}
+
+		time_remaining_ns -= elapsed_time_ns(&t1, &t2);
+	}
+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;
+}