From 005e305c226770deef7cdfcd4c03b857f96687ff Mon Sep 17 00:00:00 2001 From: Vijay Pai Date: Fri, 10 Jul 2015 15:18:45 -0700 Subject: Initial checkin commit for lockfree stack. Tests not yet included. --- src/core/support/stack_lockfree.h | 50 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 src/core/support/stack_lockfree.h (limited to 'src/core/support/stack_lockfree.h') diff --git a/src/core/support/stack_lockfree.h b/src/core/support/stack_lockfree.h new file mode 100644 index 0000000000..7919ef38cc --- /dev/null +++ b/src/core/support/stack_lockfree.h @@ -0,0 +1,50 @@ +/* + * + * Copyright 2015, 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. + * + */ + +#ifndef GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H +#define GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H + +typedef struct gpr_stack_lockfree gpr_stack_lockfree; + +/* 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(int entries); +void gpr_stack_lockfree_destroy(gpr_stack_lockfree *); + +/* Pass in a valid entry number for the next stack entry */ +void gpr_stack_lockfree_push(gpr_stack_lockfree *, int entry); + +/* Returns -1 on empty or the actual entry number */ +int gpr_stack_lockfree_pop(gpr_stack_lockfree *); + +#endif /* GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H */ -- cgit v1.2.3