4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2001, 2004 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 1999, 2000, 2001 Bernie Innocenti <bernie@codewiz.org>
34 * \brief Internal scheduler structures and definitions for processes.
37 * \author Bernie Innocenti <bernie@codewiz.org>
43 #include "cfg/cfg_kern.h"
44 #include <cfg/compiler.h>
46 #include <cpu/types.h> /* for cpu_stack_t */
48 #include <struct/list.h>
50 #if CONFIG_KERN_PREEMPT
51 #include <ucontext.h> // XXX
54 typedef struct Process
57 PriNode link; /**< Link Process into scheduler lists */
59 Node link; /**< Link Process into scheduler lists */
61 cpu_stack_t *stack; /**< Per-process SP */
62 iptr_t user_data; /**< Custom data passed to the process */
64 #if CONFIG_KERN_SIGNALS
65 sigmask_t sig_wait; /**< Signals the process is waiting for */
66 sigmask_t sig_recv; /**< Received signals */
70 uint16_t flags; /**< Flags */
73 #if CONFIG_KERN_HEAP | CONFIG_KERN_MONITOR | (ARCH & ARCH_EMUL)
74 cpu_stack_t *stack_base; /**< Base of process stack */
75 size_t stack_size; /**< Size of process stack */
78 #if CONFIG_KERN_PREEMPT
82 #if CONFIG_KERN_MONITOR
94 * \name Flags for Process.flags.
97 #define PF_FREESTACK BV(0) /**< Free the stack when process dies */
101 /** Track running processes. */
102 extern REGISTER Process *CurrentProcess;
105 * Track ready processes.
107 * Access to this list must be performed with interrupts disabled
109 extern REGISTER List ProcReadyList;
112 #define SCHED_ENQUEUE_INTERNAL(proc) LIST_ENQUEUE(&ProcReadyList, &(proc)->link)
114 #define SCHED_ENQUEUE_INTERNAL(proc) ADDTAIL(&ProcReadyList, &(proc)->link)
118 * Enqueue a process in the ready list.
120 * Always use this macro to instert a process in the ready list, as its
121 * might vary to implement a different scheduling algorithms.
123 * \note Access to the scheduler ready list must be performed with
124 * interrupts disabled.
126 #define SCHED_ENQUEUE(proc) do { \
127 IRQ_ASSERT_DISABLED(); \
128 LIST_ASSERT_VALID(&ProcReadyList); \
129 SCHED_ENQUEUE_INTERNAL(proc); \
133 /// Schedule another process *without* adding the current one to the ready list.
134 void proc_switch(void);
136 #if CONFIG_KERN_PREEMPT
137 void proc_entry(void (*user_entry)(void));
138 void preempt_init(void);
141 #if CONFIG_KERN_MONITOR
142 /** Initialize the monitor */
143 void monitor_init(void);
145 /** Register a process into the monitor */
146 void monitor_add(Process *proc, const char *name);
148 /** Unregister a process from the monitor */
149 void monitor_remove(Process *proc);
151 /** Rename a process */
152 void monitor_rename(Process *proc, const char *name);
153 #endif /* CONFIG_KERN_MONITOR */
155 #endif /* KERN_PROC_P_H */