1 files changed, 81 insertions, 0 deletions
diff --git a/src/core/support/time_posix.c b/src/core/support/time_posix.c
new file mode 100644
index 0000000000..e7b79d10b1
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+++ b/src/core/support/time_posix.c
@@ -0,0 +1,81 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* Posix code for gpr time support. */
+
+/* So we get nanosleep and clock_* */
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 199309L
+#endif
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <grpc/support/time.h>
+
+#if _POSIX_TIMERS > 0
+gpr_timespec gpr_now(void) {
+  gpr_timespec now;
+  clock_gettime(CLOCK_REALTIME, &now);
+  return now;
+}
+#else
+/* For some reason Apple's OSes haven't implemented clock_gettime. */
+/* TODO(klempner): Add special handling for Apple. */
+gpr_timespec gpr_now(void) {
+  gpr_timespec now;
+  struct timeval now_tv;
+  gettimeofday(&now_tv, NULL);
+  now.tv_sec = now_tv.tv_sec;
+  now.tv_nsec = now_tv.tv_usec / 1000;
+  return now;
+}
+#endif
+
+void gpr_sleep_until(gpr_timespec until) {
+  gpr_timespec now;
+  gpr_timespec delta;
+
+  for (;;) {
+    /* We could simplify by using clock_nanosleep instead, but it might be
+     * slightly less portable. */
+    now = gpr_now();
+    if (gpr_time_cmp(until, now) <= 0) {
+      return;
+    }
+
+    delta = gpr_time_sub(until, now);
+    if (nanosleep(&delta, NULL) == 0) {
+      break;
+    }
+  }
+}