/*
 * Amazon FreeRTOS+POSIX V1.0.0
 * Copyright (C) 2018 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * SPDX-FileCopyrightText: 2018 Amazon.com, Inc. or its affiliates
 *
 * SPDX-License-Identifier: MIT
 *
 * SPDX-FileContributor: 2024 Espressif Systems (Shanghai) CO LTD
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * http://aws.amazon.com/freertos
 * http://www.FreeRTOS.org
 */

#ifndef _FREERTOS_POSIX_INTERNAL_H_
#define _FREERTOS_POSIX_INTERNAL_H_

/**
 * @file FreeRTOS_POSIX_internal.h
 * @brief Internal structs and initializers for FreeRTOS+POSIX.
 */

/* Amazon FreeRTOS includes. */
#include "aws_doubly_linked_list.h"

/**
 * @brief Mutex attribute object.
 */
typedef struct pthread_mutexattr_internal
{
    int iType; /**< Mutex type. */
} pthread_mutexattr_internal_t;

/**
 * @brief Mutex.
 */
typedef struct pthread_mutex_internal
{
    BaseType_t xIsInitialized;          /**< Set to pdTRUE if this mutex is initialized, pdFALSE otherwise. */
    StaticSemaphore_t xMutex;           /**< FreeRTOS mutex. */
    TaskHandle_t xTaskOwner;            /**< Owner; used for deadlock detection and permission checks. */
    pthread_mutexattr_internal_t xAttr; /**< Mutex attributes. */
} pthread_mutex_internal_t;

/**
 * @brief Compile-time initializer of pthread_mutex_internal_t.
 */
#define FREERTOS_POSIX_MUTEX_INITIALIZER \
    ( &( ( pthread_mutex_internal_t )    \
    {                                    \
        .xIsInitialized = pdFALSE,       \
        .xMutex = { { 0 } },             \
        .xTaskOwner = NULL,              \
        .xAttr = { .iType = 0 }          \
    }                                    \
         )                               \
    )

/**
 * @brief Condition variable.
 */
typedef struct pthread_cond_internal
{
    BaseType_t xIsInitialized;            /**< Set to pdTRUE if this condition variable is initialized, pdFALSE otherwise. */
    StaticSemaphore_t xCondMutex;         /**< Prevents concurrent accesses to iWaitingThreads. */
    StaticSemaphore_t xCondWaitSemaphore; /**< Threads block on this semaphore in pthread_cond_wait. */
    int iWaitingThreads;                  /**< The number of threads currently waiting on this condition variable. */
} pthread_cond_internal_t;

/**
 * @brief Compile-time initializer of pthread_cond_internal_t.
 */
#define FREERTOS_POSIX_COND_INITIALIZER  \
    ( &( ( pthread_cond_internal_t )     \
    {                                    \
        .xIsInitialized = pdFALSE,       \
        .xCondMutex = { { 0 } },         \
        .xCondWaitSemaphore = { { 0 } }, \
        .iWaitingThreads = 0             \
    }                                    \
         )                               \
    )

#endif /* _FREERTOS_POSIX_INTERNAL_H_ */