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libc/pthread: Implement pthread_rwlockattr API

Browse Source 
https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_rwlockattr_getpshared.html

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao
2023-01-20 22:06:45 +08:00
committed by Gustavo Henrique Nihei
parent 679544cd32
commit 36b74bab02
7 changed files with 351 additions and 27 deletions
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libs/libc/pthread/Make.defs
+2
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@@ -50,6 +50,8 @@ CSRCS += pthread_mutexattr_settype.c pthread_mutexattr_gettype.c
CSRCS += pthread_mutexattr_setrobust.c pthread_mutexattr_getrobust.c
CSRCS += pthread_mutex_lock.c
CSRCS += pthread_once.c pthread_yield.c pthread_atfork.c
CSRCS += pthread_rwlockattr_init.c pthread_rwlockattr_destroy.c
CSRCS += pthread_rwlockattr_getpshared.c pthread_rwlockattr_setpshared.c
CSRCS += pthread_rwlock.c pthread_rwlock_rdlock.c pthread_rwlock_wrlock.c
CSRCS += pthread_setcancelstate.c pthread_setcanceltype.c
CSRCS += pthread_testcancel.c
libs/libc/pthread/pthread_rwlockattr_destroy.c
+64
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@@ -0,0 +1,64 @@
/********************************************************************************
* libs/libc/pthread/pthread_rwlockattr_destroy.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
********************************************************************************/
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
/********************************************************************************
* Public Functions
********************************************************************************/
/********************************************************************************
* Name: pthread_rwlockattr_destroy
*
* Description:
* The pthread_rwlockattr_destroy() function will destroy a rwlock attributes
* object. A destroyed attr attributes object can be reinitialized using
* pthread_rwlockattr_init(); the results of otherwise referencing the object
* after it has been destroyed are undefined.
*
* Input Parameters:
* attr - rwlock attributes to be destroyed.
*
* Returned Value:
* 0 (OK) on success or EINVAL if attr is invalid.
*
* Assumptions:
*
********************************************************************************/
int pthread_rwlockattr_destroy(FAR pthread_rwlockattr_t *attr)
{
int ret = OK;
if (!attr)
{
ret = EINVAL;
}
return ret;
}
libs/libc/pthread/pthread_rwlockattr_getpshared.c
+68
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@@ -0,0 +1,68 @@
/********************************************************************************
* libs/libc/pthread/pthread_rwlockattr_getpshared.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
********************************************************************************/
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
/********************************************************************************
* Public Functions
********************************************************************************/
/********************************************************************************
* Name: pthread_rwlockattr_getpshared
*
* Description:
* The pthread_rwlockattr_getpshared() function will obtain the value of the
* process-shared attribute from the attributes object referenced by attr.
*
* Input Parameters:
* attr - rwlock attributes to be queried.
* pshared - the location to stored the current value of the pshared attribute.
*
* Returned Value:
* 0 (OK) on success or EINVAL if either attr or pshared is invalid.
*
* Assumptions:
*
********************************************************************************/
int pthread_rwlockattr_getpshared(FAR const pthread_rwlockattr_t *attr,
FAR int *pshared)
{
int ret = OK;
if (!attr || !pshared)
{
ret = EINVAL;
}
else
{
*pshared = attr->pshared;
}
return ret;
}
libs/libc/pthread/pthread_rwlockattr_init.c
+67
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@@ -0,0 +1,67 @@
/********************************************************************************
* libs/libc/pthread/pthread_rwlockattr_init.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
********************************************************************************/
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
/********************************************************************************
* Public Functions
********************************************************************************/
/********************************************************************************
* Name: pthread_rwlockattr_init
*
* Description:
* The pthread_rwlockattr_init() function will initialize a rwlock attribute
* object attr with the default value for all of the attributes defined by the
* implementation.
*
* Input Parameters:
* attr - rwlock attributes to be initialized.
*
* Returned Value:
* 0 (OK) on success or EINVAL if attr is invalid.
*
* Assumptions:
*
********************************************************************************/
int pthread_rwlockattr_init(FAR pthread_rwlockattr_t *attr)
{
int ret = OK;
if (!attr)
{
ret = EINVAL;
}
else
{
attr->pshared = PTHREAD_PROCESS_PRIVATE;
}
return ret;
}
libs/libc/pthread/pthread_rwlockattr_setpshared.c
+99
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@@ -0,0 +1,99 @@
/********************************************************************************
* libs/libc/pthread/pthread_rwlockattr_setpshared.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
********************************************************************************/
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
/********************************************************************************
* Pre-processor Definitions
********************************************************************************/
/********************************************************************************
* Private Type Declarations
********************************************************************************/
/********************************************************************************
* Public Data
********************************************************************************/
/********************************************************************************
* Private Data
********************************************************************************/
/********************************************************************************
* Private Function Prototypes
********************************************************************************/
/********************************************************************************
* Public Functions
********************************************************************************/
/********************************************************************************
* Name: pthread_rwlockattr_setpshared
*
* Description:
* The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit
* a rwlock to be operated upon by any thread that has access to the
* memory where the rwlock is allocated. If the process-shared attribute
* is PTHREAD_PROCESS_PRIVATE, the rwlock can only be operated upon by
* threads created within the same process as the thread that initialized
* the rwlock.
* If threads of different processes attempt to operate on such a rwlock,
* the behavior is undefined. The default value of the attribute is
* PTHREAD_PROCESS_PRIVATE.
*
* Both constants PTHREAD_PROCESS_SHARED and PTHREAD_PROCESS_PRIVATE are
* defined in pthread.h.
*
* Input Parameters:
* attr - rwlock attributes to be modified.
* pshared - the new value of the pshared attribute.
*
* Returned Value:
* 0 (OK) on success or EINVAL if either attr is invalid or pshared is not
* one of PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.
*
* Assumptions:
*
********************************************************************************/
int pthread_rwlockattr_setpshared(FAR pthread_rwlockattr_t *attr, int pshared)
{
int ret = OK;
if (!attr || (pshared != PTHREAD_PROCESS_SHARED &&
pshared != PTHREAD_PROCESS_PRIVATE))
{
ret = EINVAL;
}
else
{
attr->pshared = pshared;
}
return ret;
}