Initial checkin of gRPC to third_party/

third_party/grpc/src/core/support/stack_lockfree.h

Index: third_party/grpc/src/core/support/stack_lockfree.h
diff --git a/third_party/tcmalloc/chromium/src/base/linuxthreads.h b/third_party/grpc/src/core/support/stack_lockfree.h
similarity index 64%
copy from third_party/tcmalloc/chromium/src/base/linuxthreads.h
copy to third_party/grpc/src/core/support/stack_lockfree.h
index 5c318fed7ec4c47e7bf082e315992e102abcd620..ca58dd007a2ef7b4adb575b57de1bdd61ce8d516 100644
--- a/third_party/tcmalloc/chromium/src/base/linuxthreads.h
+++ b/third_party/grpc/src/core/support/stack_lockfree.h
@@ -1,4 +1,6 @@
-/* Copyright (c) 2005-2007, Google Inc.
+/*
+ *
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,27 +29,25 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * ---
- * Author: Markus Gutschke
  */
 
-#ifndef _LINUXTHREADS_H
-#define _LINUXTHREADS_H
+#ifndef GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H
+#define GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H
 
-/* Include thread_lister.h to get the interface that we implement for linux.
- */
+#include <stddef.h>
 
-/* We currently only support x86-32 and x86-64 on Linux. Porting to other
- * related platforms should not be difficult.
- */
-#if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) || \
-     defined(__mips__) || defined(__PPC__)) && defined(__linux)
+typedef struct gpr_stack_lockfree gpr_stack_lockfree;
 
-/* Define the THREADS symbol to make sure that there is exactly one core dumper
- * built into the library.
- */
-#define THREADS "Linux /proc"
+/* This stack must specify the maximum number of entries to track.
+   The current implementation only allows up to 65534 entries */
+gpr_stack_lockfree *gpr_stack_lockfree_create(size_t entries);
+void gpr_stack_lockfree_destroy(gpr_stack_lockfree *stack);
+
+/* Pass in a valid entry number for the next stack entry */
+/* Returns 1 if this is the first element on the stack, 0 otherwise */
+int gpr_stack_lockfree_push(gpr_stack_lockfree *, int entry);
 
-#endif
+/* Returns -1 on empty or the actual entry number */
+int gpr_stack_lockfree_pop(gpr_stack_lockfree *stack);
 
-#endif  /* _LINUXTHREADS_H */
+#endif /* GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H */