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/*
* Copyright (c) 2006 Jakub Jermar
* Copyright (c) 2008 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** @addtogroup libc
* @{
*/
/** @file
*/
#include <task.h>
#include <libc.h>
#include <stdlib.h>
#include <errno.h>
#include <loader/loader.h>
#include <string.h>
#include <ipc/ns.h>
#include <macros.h>
#include <async.h>
task_id_t task_get_id(void)
{
task_id_t task_id;
(void) __SYSCALL1(SYS_TASK_GET_ID, (sysarg_t) &task_id);
return task_id;
}
/** Set the task name.
*
* @param name The new name, typically the command used to execute the
* program.
*
* @return Zero on success or negative error code.
*
*/
int task_set_name(const char *name)
{
return __SYSCALL2(SYS_TASK_SET_NAME, (sysarg_t) name, str_size(name));
}
/** Create a new task by running an executable from the filesystem.
*
* This is really just a convenience wrapper over the more complicated
* loader API.
*
* @param path pathname of the binary to execute
* @param argv command-line arguments
*
* @return ID of the newly created task or zero on error.
*
*/
task_id_t task_spawn(const char *path, char *const args[])
{
/* Connect to a program loader. */
loader_t *ldr = loader_connect();
if (ldr == NULL)
return 0;
/* Get task ID. */
task_id_t task_id;
int rc = loader_get_task_id(ldr, &task_id);
if (rc != EOK)
goto error;
/* Send program pathname. */
rc = loader_set_pathname(ldr, path);
if (rc != EOK)
goto error;
/* Send arguments. */
rc = loader_set_args(ldr, args);
if (rc != EOK)
goto error;
/* Send default files */
fdi_node_t *files[4];
fdi_node_t stdin_node;
fdi_node_t stdout_node;
fdi_node_t stderr_node;
if ((stdin != NULL) && (fnode(stdin, &stdin_node) == EOK))
files[0] = &stdin_node;
else
files[0] = NULL;
if ((stdout != NULL) && (fnode(stdout, &stdout_node) == EOK))
files[1] = &stdout_node;
else
files[1] = NULL;
if ((stderr != NULL) && (fnode(stderr, &stderr_node) == EOK))
files[2] = &stderr_node;
else
files[2] = NULL;
files[3] = NULL;
rc = loader_set_files(ldr, files);
if (rc != EOK)
goto error;
/* Load the program. */
rc = loader_load_program(ldr);
if (rc != EOK)
goto error;
/* Run it. */
rc = loader_run(ldr);
if (rc != EOK)
goto error;
/* Success */
free(ldr);
return task_id;
error:
/* Error exit */
loader_abort(ldr);
free(ldr);
return 0;
}
int task_wait(task_id_t id, int *retval)
{
ipcarg_t rv;
int rc;
rc = (int) async_req_2_1(PHONE_NS, NS_TASK_WAIT, LOWER32(id),
UPPER32(id), &rv);
*retval = rv;
return rc;
}
int task_retval(int val)
{
return (int) async_req_1_0(PHONE_NS, NS_RETVAL, val);
}
/** @}
*/