process.h

/*
 * Copyright (C) 2013 Philippe Gerum <rpm@xenomai.org>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
#ifndef _COBALT_POSIX_PROCESS_H
#define _COBALT_POSIX_PROCESS_H
 
#include <linux/list.h>
#include <linux/bitmap.h>
#include <pipeline/thread.h>
#include <cobalt/kernel/ppd.h>
 
#define NR_PERSONALITIES  4
#if BITS_PER_LONG < NR_PERSONALITIES
#error "NR_PERSONALITIES overflows internal bitmap"
#endif
 
struct mm_struct;
struct xnthread_personality;
struct cobalt_timer;
 
struct cobalt_resources {
        struct list_head condq;
        struct list_head mutexq;
        struct list_head semq;
        struct list_head monitorq;
        struct list_head eventq;
        struct list_head schedq;
};
 
struct cobalt_process {
        struct mm_struct *mm;
        struct hlist_node hlink;
        struct cobalt_ppd sys_ppd;
        unsigned long permap;
        struct rb_root usems;
        struct list_head sigwaiters;
        struct cobalt_resources resources;
        struct list_head thread_list;
        DECLARE_BITMAP(timers_map, CONFIG_XENO_OPT_NRTIMERS);
        struct cobalt_timer *timers[CONFIG_XENO_OPT_NRTIMERS];
        void *priv[NR_PERSONALITIES];
        int ufeatures;
        unsigned int debugged_threads;
};
 
struct cobalt_resnode {
        struct cobalt_resources *scope;
        struct cobalt_process *owner;
        struct list_head next;
        xnhandle_t handle;
};
 
int cobalt_register_personality(struct xnthread_personality *personality);
 
int cobalt_unregister_personality(int xid);
 
struct xnthread_personality *cobalt_push_personality(int xid);
 
void cobalt_pop_personality(struct xnthread_personality *prev);
 
int cobalt_bind_core(int ufeatures);
 
int cobalt_bind_personality(unsigned int magic);
 
struct cobalt_process *cobalt_search_process(struct mm_struct *mm);
 
int cobalt_map_user(struct xnthread *thread, __u32 __user *u_winoff);
 
void *cobalt_get_context(int xid);
 
int cobalt_yield(xnticks_t min, xnticks_t max);
 
int cobalt_process_init(void);
 
extern struct list_head cobalt_global_thread_list;
 
extern struct cobalt_resources cobalt_global_resources;
 
static inline struct cobalt_process *cobalt_current_process(void)
{
        return pipeline_current()->process;
}
 
static inline struct cobalt_process *
cobalt_set_process(struct cobalt_process *process)
{
        struct cobalt_threadinfo *p = pipeline_current();
        struct cobalt_process *old;
 
        old = p->process;
        p->process = process;
 
        return old;
}
 
static inline struct cobalt_ppd *cobalt_ppd_get(int global)
{
        struct cobalt_process *process;
 
        if (global || (process = cobalt_current_process()) == NULL)
                return &cobalt_kernel_ppd;
 
        return &process->sys_ppd;
}
 
static inline struct cobalt_resources *cobalt_current_resources(int pshared)
{
        struct cobalt_process *process;
 
        if (pshared || (process = cobalt_current_process()) == NULL)
                return &cobalt_global_resources;
 
        return &process->resources;
}
 
static inline
void __cobalt_add_resource(struct cobalt_resnode *node, int pshared)
{
        node->owner = cobalt_current_process();
        node->scope = cobalt_current_resources(pshared);
}
 
#define cobalt_add_resource(__node, __type, __pshared)                  \
        do {                                                            \
                __cobalt_add_resource(__node, __pshared);               \
                list_add_tail(&(__node)->next,                          \
                              &((__node)->scope)->__type ## q);         \
        } while (0)
 
static inline
void cobalt_del_resource(struct cobalt_resnode *node)
{
        list_del(&node->next);
}
 
void cobalt_remove_process(struct cobalt_process *process);
 
void cobalt_signal_yield(void);
 
void cobalt_stop_debugged_process(struct xnthread *thread);
 
void cobalt_register_debugged_thread(struct xnthread *thread);
 
void cobalt_unregister_debugged_thread(struct xnthread *thread);
 
extern struct xnthread_personality *cobalt_personalities[];
 
extern struct xnthread_personality cobalt_personality;
 
int cobalt_handle_setaffinity_event(struct task_struct *task);
 
#ifdef CONFIG_SMP
void cobalt_adjust_affinity(struct task_struct *task);
#else
static inline void cobalt_adjust_affinity(struct task_struct *task) { }
#endif
 
int cobalt_handle_taskexit_event(struct task_struct *task);
 
int cobalt_handle_cleanup_event(struct mm_struct *mm);
 
int cobalt_handle_user_return(struct task_struct *task);
 
#endif /* !_COBALT_POSIX_PROCESS_H */