Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc / deps / grpc / third_party / boringssl / crypto / rand_extra / forkunsafe.c

diff --git a/legacy-libs/grpc/deps/grpc/third_party/boringssl/crypto/rand_extra/forkunsafe.c b/legacy-libs/grpc/deps/grpc/third_party/boringssl/crypto/rand_extra/forkunsafe.c
new file mode 100644 (file)
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--- /dev/null
+++ b/legacy-libs/grpc/deps/grpc/third_party/boringssl/crypto/rand_extra/forkunsafe.c
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+/* Copyright (c) 2017, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <openssl/rand.h>
+
+#include <stdlib.h>
+
+#include "../fipsmodule/rand/internal.h"
+
+
+// g_buffering_enabled is true if fork-unsafe buffering has been enabled.
+static int g_buffering_enabled = 0;
+
+// g_lock protects |g_buffering_enabled|.
+static struct CRYPTO_STATIC_MUTEX g_lock = CRYPTO_STATIC_MUTEX_INIT;
+
+#if !defined(OPENSSL_WINDOWS)
+void RAND_enable_fork_unsafe_buffering(int fd) {
+  // We no longer support setting the file-descriptor with this function.
+  if (fd != -1) {
+    abort();
+  }
+
+  CRYPTO_STATIC_MUTEX_lock_write(&g_lock);
+  g_buffering_enabled = 1;
+  CRYPTO_STATIC_MUTEX_unlock_write(&g_lock);
+}
+#endif
+
+int rand_fork_unsafe_buffering_enabled(void) {
+  CRYPTO_STATIC_MUTEX_lock_read(&g_lock);
+  const int ret = g_buffering_enabled;
+  CRYPTO_STATIC_MUTEX_unlock_read(&g_lock);
+  return ret;
+}