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Diffstat (limited to 'src/core/lib/support/stack_lockfree.h')
| -rw-r--r-- | src/core/lib/support/stack_lockfree.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/core/lib/support/stack_lockfree.h b/src/core/lib/support/stack_lockfree.h new file mode 100644 index 0000000000..a030a01d1f --- /dev/null +++ b/src/core/lib/support/stack_lockfree.h @@ -0,0 +1,53 @@ +/* + * + * Copyright 2015-2016, 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_CORE_LIB_SUPPORT_STACK_LOCKFREE_H +#define GRPC_CORE_LIB_SUPPORT_STACK_LOCKFREE_H + +#include <stddef.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(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); + +/* Returns -1 on empty or the actual entry number */ +int gpr_stack_lockfree_pop(gpr_stack_lockfree *stack); + +#endif /* GRPC_CORE_LIB_SUPPORT_STACK_LOCKFREE_H */ |