posix/src/pthread_attr.c

/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 HOLDER 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.
 */

#include <errno.h>
#include <pthread.h>
#include <limits.h>

int pthread_attr_init(pthread_attr_t *attr)
{
    if (attr == NULL) {
        return EINVAL;
    }

    attr->detachstate                 = PTHREAD_CREATE_JOINABLE;
    attr->schedpolicy                 = SCHED_RR;
    attr->schedparam.sched_priority   = LOSCFG_BASE_CORE_TSK_DEFAULT_PRIO;
    attr->inheritsched                = PTHREAD_INHERIT_SCHED;
    attr->scope                       = PTHREAD_SCOPE_PROCESS;
    attr->stackaddr_set               = 0;
    attr->stackaddr                   = NULL;
    attr->stacksize_set               = 1;
    attr->stacksize                   = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;

    return 0;
}

int pthread_attr_destroy(pthread_attr_t *attr)
{
    if (attr == NULL) {
        return EINVAL;
    }

    /* Nothing to do here... */
    return 0;
}

int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachState)
{
    if ((attr != NULL) && ((detachState == PTHREAD_CREATE_JOINABLE) || (detachState == PTHREAD_CREATE_DETACHED))) {
        attr->detachstate = (UINT32)detachState;
        return 0;
    }

    return EINVAL;
}

int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachState)
{
    if ((attr == NULL) || (detachState == NULL)) {
        return EINVAL;
    }

    *detachState = (int)attr->detachstate;

    return 0;
}

int pthread_attr_setscope(pthread_attr_t *attr, int scope)
{
    if (attr == NULL) {
        return EINVAL;
    }

    if (scope == PTHREAD_SCOPE_PROCESS) {
        attr->scope = (unsigned int)scope;
        return 0;
    }

    if (scope == PTHREAD_SCOPE_SYSTEM) {
        return ENOTSUP;
    }

    return EINVAL;
}

int pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
{
    if ((attr == NULL) || (scope == NULL)) {
        return EINVAL;
    }

    *scope = (int)attr->scope;

    return 0;
}

int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
{
    if ((attr != NULL) && ((inherit == PTHREAD_INHERIT_SCHED) || (inherit == PTHREAD_EXPLICIT_SCHED))) {
        attr->inheritsched = (UINT32)inherit;
        return 0;
    }

    return EINVAL;
}

int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
{
    if ((attr == NULL) || (inherit == NULL)) {
        return EINVAL;
    }

    *inherit = (int)attr->inheritsched;

    return 0;
}

int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
{
    if ((attr != NULL) && (policy == SCHED_RR)) {
        attr->schedpolicy = SCHED_RR;
        return 0;
    }

    return EINVAL;
}

int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
{
    if ((attr == NULL) || (policy == NULL)) {
        return EINVAL;
    }

    *policy = (int)attr->schedpolicy;

    return 0;
}

int pthread_attr_setschedparam(pthread_attr_t *attr, const struct sched_param *param)
{
    if ((attr == NULL) || (param == NULL)) {
        return EINVAL;
    } else if ((param->sched_priority < OS_TASK_PRIORITY_HIGHEST) ||
               (param->sched_priority >= OS_TASK_PRIORITY_LOWEST)) {
        return ENOTSUP;
    }

    attr->schedparam = *param;

    return 0;
}

int pthread_attr_getschedparam(const pthread_attr_t *attr, struct sched_param *param)
{
    if ((attr == NULL) || (param == NULL)) {
        return EINVAL;
    }

    *param = attr->schedparam;

    return 0;
}

/*
 * Set starting address of stack. Whether this is at the start or end of
 * the memory block allocated for the stack depends on whether the stack
 * grows up or down.
 */
int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackAddr)
{
    if (attr == NULL) {
        return EINVAL;
    }

    attr->stackaddr_set = 1;
    attr->stackaddr     = stackAddr;

    return 0;
}

int pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackAddr)
{
    if (((attr != NULL) && (stackAddr != NULL)) && attr->stackaddr_set) {
        *stackAddr = attr->stackaddr;
        return 0;
    }

    return EINVAL; /* Stack address not set, return EINVAL. */
}

int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stackSize)
{
    /* Reject inadequate stack sizes */
    if ((attr == NULL) || (stackSize < PTHREAD_STACK_MIN)) {
        return EINVAL;
    }

    attr->stacksize_set = 1;
    attr->stacksize     = stackSize;

    return 0;
}

int pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stackSize)
{
    /* Reject attempts to get a stack size when one has not been set. */
    if ((attr == NULL) || (stackSize == NULL) || (!attr->stacksize_set)) {
        return EINVAL;
    }

    *stackSize = attr->stacksize;

    return 0;
}