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_proc.h"
44 #include "cfg/cfg_signal.h"
45 #include "cfg/cfg_monitor.h"
47 #include <cfg/compiler.h>
49 #include <cpu/types.h> /* for cpu_stack_t */
51 #include <struct/list.h>
53 #if CONFIG_KERN_PREEMPT
54 #include <ucontext.h> // XXX
57 typedef struct Process
60 PriNode link; /**< Link Process into scheduler lists */
62 Node link; /**< Link Process into scheduler lists */
64 cpu_stack_t *stack; /**< Per-process SP */
65 iptr_t user_data; /**< Custom data passed to the process */
67 #if CONFIG_KERN_SIGNALS
68 sigmask_t sig_wait; /**< Signals the process is waiting for */
69 sigmask_t sig_recv; /**< Received signals */
73 uint16_t flags; /**< Flags */
76 #if CONFIG_KERN_HEAP | CONFIG_KERN_MONITOR | (ARCH & ARCH_EMUL)
77 cpu_stack_t *stack_base; /**< Base of process stack */
78 size_t stack_size; /**< Size of process stack */
81 #if CONFIG_KERN_PREEMPT
85 #if CONFIG_KERN_MONITOR
97 * \name Flags for Process.flags.
100 #define PF_FREESTACK BV(0) /**< Free the stack when process dies */
104 /** Track running processes. */
105 extern REGISTER Process *CurrentProcess;
108 * Track ready processes.
110 * Access to this list must be performed with interrupts disabled
112 extern REGISTER List ProcReadyList;
115 #define SCHED_ENQUEUE_INTERNAL(proc) LIST_ENQUEUE(&ProcReadyList, &(proc)->link)
117 #define SCHED_ENQUEUE_INTERNAL(proc) ADDTAIL(&ProcReadyList, &(proc)->link)
121 * Enqueue a process in the ready list.
123 * Always use this macro to instert a process in the ready list, as its
124 * might vary to implement a different scheduling algorithms.
126 * \note Access to the scheduler ready list must be performed with
127 * interrupts disabled.
129 #define SCHED_ENQUEUE(proc) do { \
130 IRQ_ASSERT_DISABLED(); \
131 LIST_ASSERT_VALID(&ProcReadyList); \
132 SCHED_ENQUEUE_INTERNAL(proc); \
136 /// Schedule another process *without* adding the current one to the ready list.
137 void proc_switch(void);
139 #if CONFIG_KERN_PREEMPT
140 void proc_entry(void (*user_entry)(void));
141 void preempt_init(void);
144 #if CONFIG_KERN_MONITOR
145 /** Initialize the monitor */
146 void monitor_init(void);
148 /** Register a process into the monitor */
149 void monitor_add(Process *proc, const char *name);
151 /** Unregister a process from the monitor */
152 void monitor_remove(Process *proc);
154 /** Rename a process */
155 void monitor_rename(Process *proc, const char *name);
156 #endif /* CONFIG_KERN_MONITOR */
158 #endif /* KERN_PROC_P_H */