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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2017. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifndef ERTS_LOCK_FLAGS_H__
#define ERTS_LOCK_FLAGS_H__
#define ERTS_LOCK_OPTIONS_READ (1 << 1)
#define ERTS_LOCK_OPTIONS_WRITE (1 << 2)
#define ERTS_LOCK_OPTIONS_RDWR (ERTS_LOCK_OPTIONS_READ | ERTS_LOCK_OPTIONS_WRITE)
/* Property/category are bitfields to simplify their use in masks. */
#define ERTS_LOCK_FLAGS_MASK_CATEGORY (0xFFC0)
#define ERTS_LOCK_FLAGS_MASK_PROPERTY (0x0030)
/* Type is a plain number. */
#define ERTS_LOCK_FLAGS_MASK_TYPE (0x000F)
#define ERTS_LOCK_FLAGS_TYPE_SPINLOCK (1)
#define ERTS_LOCK_FLAGS_TYPE_MUTEX (2)
#define ERTS_LOCK_FLAGS_TYPE_PROCLOCK (3)
/* "Static" guarantees that the lock will never be destroyed once created. */
#define ERTS_LOCK_FLAGS_PROPERTY_STATIC (1 << 4)
#define ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE (1 << 5)
#define ERTS_LOCK_FLAGS_CATEGORY_ALLOCATOR (1 << 6)
#define ERTS_LOCK_FLAGS_CATEGORY_PROCESS (1 << 7)
#define ERTS_LOCK_FLAGS_CATEGORY_IO (1 << 8)
#define ERTS_LOCK_FLAGS_CATEGORY_DB (1 << 9)
#define ERTS_LOCK_FLAGS_CATEGORY_DEBUG (1 << 10)
#define ERTS_LOCK_FLAGS_CATEGORY_SCHEDULER (1 << 11)
#define ERTS_LOCK_FLAGS_CATEGORY_GENERIC (1 << 12)
#define ERTS_LOCK_FLAGS_CATEGORY_DISTRIBUTION (1 << 13)
#define ERTS_LOCK_TYPE_SPINLOCK \
(ERTS_LOCK_FLAGS_TYPE_SPINLOCK)
#define ERTS_LOCK_TYPE_RWSPINLOCK \
(ERTS_LOCK_TYPE_SPINLOCK | \
ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE)
#define ERTS_LOCK_TYPE_MUTEX \
(ERTS_LOCK_FLAGS_TYPE_MUTEX)
#define ERTS_LOCK_TYPE_RWMUTEX \
(ERTS_LOCK_TYPE_MUTEX | \
ERTS_LOCK_FLAGS_PROPERTY_READ_WRITE)
#define ERTS_LOCK_TYPE_PROCLOCK \
(ERTS_LOCK_FLAGS_CATEGORY_PROCESS | \
ERTS_LOCK_FLAGS_TYPE_PROCLOCK)
/* -- -- */
typedef unsigned short erts_lock_flags_t;
typedef unsigned short erts_lock_options_t;
/* @brief Gets the type name of the lock, honoring the RW flag if supplied. */
const char *erts_lock_flags_get_type_name(erts_lock_flags_t flags);
/* @brief Gets a short-form description of the given lock options. (rw/r/w) */
const char *erts_lock_options_get_short_desc(erts_lock_options_t options);
#endif /* ERTS_LOCK_FLAGS_H__ */
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