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/****************************************************************************
* include/sys/prctl.h
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 __INCLUDE_SYS_PRCTL_H
#define __INCLUDE_SYS_PRCTL_H
/****************************************************************************
* Included Files
****************************************************************************/
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Supported prctl() commands.
*
* PR_SET_NAME
* Set the task (or thread) name for the thread whose ID is in required
* arg2 (int), using the value in the location pointed to by required arg1
* (char*). The name can be up to CONFIG_TASK_NAME_SIZE long (including
* any null termination). The thread ID of 0 will set the name of the
* calling thread. As an example:
*
* prctl(PR_SET_NAME, "MyName", 0);
*
* PR_GET_NAME
* Return the task (or thread) name for the for the thread whose ID is
* optional arg2 (int), in the buffer pointed to by optional arg1 (char *).
* The buffer must be CONFIG_TASK_NAME_SIZE long (including any null
* termination). As an example:
*
* char myname[CONFIG_TASK_NAME_SIZE];
* prctl(PR_GET_NAME, myname, 0);
*/
#define PR_SET_NAME 1
#define PR_GET_NAME 2
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: prctl
*
* Description:
* prctl() is called with a first argument describing what to do (with
* values PR_* defined above) and with additional arguments depending on
* the specific command.
*
* Returned Value:
* The returned value may depend on the specific commnand. For PR_SET_NAME
* and PR_GET_NAME, the returned value of 0 indicates successful operation.
* On any failure, -1 is retruend and the errno value is set appropriately.
*
* EINVAL The value of 'option' is not recognized.
* EFAULT optional arg1 is not a valid address.
* ESRCH No task/thread can be found corresponding to that specified
* by optional arg1.
*
****************************************************************************/
EXTERN int prctl(int option, ...);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_SYS_PRCTL_H */
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