0,0 → 1,171 |
/* |
* Copyright (c) 2006 Jakub Jermar |
* 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 <thread.h> |
#include <libc.h> |
#include <stdlib.h> |
#include <libarch/faddr.h> |
#include <kernel/proc/uarg.h> |
#include <fibril.h> |
#include <string.h> |
#include <async.h> |
|
#ifndef THREAD_INITIAL_STACK_PAGES_NO |
#define THREAD_INITIAL_STACK_PAGES_NO 1 |
#endif |
|
/** Main thread function. |
* |
* This function is called from __thread_entry() and is used |
* to call the thread's implementing function and perform cleanup |
* and exit when thread returns back. Do not call this function |
* directly. |
* |
* @param uarg Pointer to userspace argument structure. |
*/ |
void __thread_main(uspace_arg_t *uarg) |
{ |
fibril_t *f; |
|
f = fibril_setup(); |
__tcb_set(f->tcb); |
|
uarg->uspace_thread_function(uarg->uspace_thread_arg); |
/* XXX: we cannot free the userspace stack while running on it */ |
// free(uarg->uspace_stack); |
// free(uarg); |
|
/* If there is a manager, destroy it */ |
async_destroy_manager(); |
fibril_teardown(f); |
|
thread_exit(0); |
} |
|
/** Create userspace thread. |
* |
* This function creates new userspace thread and allocates userspace |
* stack and userspace argument structure for it. |
* |
* @param function Function implementing the thread. |
* @param arg Argument to be passed to thread. |
* @param name Symbolic name of the thread. |
* @param tid Thread ID of the newly created thread. |
* |
* @return Zero on success or a code from @ref errno.h on failure. |
*/ |
int thread_create(void (* function)(void *), void *arg, char *name, |
thread_id_t *tid) |
{ |
char *stack; |
uspace_arg_t *uarg; |
int rc; |
|
stack = (char *) malloc(getpagesize() * THREAD_INITIAL_STACK_PAGES_NO); |
if (!stack) |
return -1; |
|
uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t)); |
if (!uarg) { |
free(stack); |
return -1; |
} |
|
uarg->uspace_entry = (void *) FADDR(__thread_entry); |
uarg->uspace_stack = (void *) stack; |
uarg->uspace_thread_function = function; |
uarg->uspace_thread_arg = arg; |
uarg->uspace_uarg = uarg; |
|
rc = __SYSCALL3(SYS_THREAD_CREATE, (sysarg_t) uarg, (sysarg_t) name, |
(sysarg_t) tid); |
|
if (rc) { |
/* |
* Failed to create a new thread. |
* Free up the allocated structures. |
*/ |
free(uarg); |
free(stack); |
} |
|
return rc; |
} |
|
/** Terminate current thread. |
* |
* @param status Exit status. Currently not used. |
*/ |
void thread_exit(int status) |
{ |
__SYSCALL1(SYS_THREAD_EXIT, (sysarg_t) status); |
} |
|
/** Detach thread. |
* |
* Currently not implemented. |
* |
* @param thread TID. |
*/ |
void thread_detach(thread_id_t thread) |
{ |
} |
|
/** Join thread. |
* |
* Currently not implemented. |
* |
* @param thread TID. |
* |
* @return Thread exit status. |
*/ |
int thread_join(thread_id_t thread) |
{ |
} |
|
/** Get current thread ID. |
* |
* @return Current thread ID. |
*/ |
thread_id_t thread_get_id(void) |
{ |
thread_id_t thread_id; |
|
(void) __SYSCALL1(SYS_THREAD_GET_ID, (sysarg_t) &thread_id); |
|
return thread_id; |
} |
|
/** @} |
*/ |