780f79e7a4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11504 a1c6a512-1295-4272-9138-f99709370657
149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Ulf Ralberg
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef THREAD_H
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#define THREAD_H
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#include "config.h"
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#include <stdbool.h>
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/* Priority scheduling (when enabled with HAVE_PRIORITY_SCHEDULING) works
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* by giving high priority threads more CPU time than less priority threads
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* when they need it.
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*
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* If software playback codec pcm buffer is going down to critical, codec
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* can change it own priority to REALTIME to override user interface and
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* prevent playback skipping.
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*/
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#define PRIORITY_REALTIME 1
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#define PRIORITY_USER_INTERFACE 4 /* The main thread */
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#define PRIORITY_RECORDING 4 /* Recording thread */
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#define PRIORITY_PLAYBACK 4 /* or REALTIME when needed */
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#define PRIORITY_BUFFERING 4 /* Codec buffering thread */
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#define PRIORITY_SYSTEM 6 /* All other firmware threads */
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#define PRIORITY_BACKGROUND 8 /* Normal application threads */
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#if CONFIG_CODEC == SWCODEC
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#define MAXTHREADS 15
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#else
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#define MAXTHREADS 11
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#endif
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#define DEFAULT_STACK_SIZE 0x400 /* Bytes */
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#ifndef SIMULATOR
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/* Need to keep structures inside the header file because debug_menu
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* needs them. */
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# ifdef CPU_COLDFIRE
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struct regs
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{
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unsigned int macsr; /* EMAC status register */
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unsigned int d[6]; /* d2-d7 */
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unsigned int a[5]; /* a2-a6 */
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void *sp; /* Stack pointer (a7) */
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void *start; /* Thread start address, or NULL when started */
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};
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# elif CONFIG_CPU == SH7034
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struct regs
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{
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unsigned int r[7]; /* Registers r8 thru r14 */
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void *sp; /* Stack pointer (r15) */
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void *pr; /* Procedure register */
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void *start; /* Thread start address, or NULL when started */
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};
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# elif defined(CPU_ARM)
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struct regs
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{
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unsigned int r[8]; /* Registers r4-r11 */
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void *sp; /* Stack pointer (r13) */
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unsigned int lr; /* r14 (lr) */
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void *start; /* Thread start address, or NULL when started */
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};
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# endif
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#endif /* !SIMULATOR */
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#define STATE_RUNNING 0
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#define STATE_BLOCKED 1
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#define STATE_SLEEPING 2
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#define STATE_BLOCKED_W_TMO 3
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#define GET_STATE_ARG(state) (state & 0x3FFFFFFF)
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#define GET_STATE(state) ((state >> 30) & 3)
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#define SET_STATE(state,arg) ((state << 30) | (arg))
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struct thread_entry {
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#ifndef SIMULATOR
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struct regs context;
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#endif
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const char *name;
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void *stack;
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unsigned long statearg;
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unsigned short stack_size;
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#ifdef HAVE_PRIORITY_SCHEDULING
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unsigned short priority;
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long last_run;
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#endif
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struct thread_entry *next, *prev;
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};
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struct core_entry {
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struct thread_entry threads[MAXTHREADS];
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struct thread_entry *running;
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struct thread_entry *sleeping;
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};
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#ifdef HAVE_PRIORITY_SCHEDULING
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#define IF_PRIO(empty, type) , type
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#else
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#define IF_PRIO(empty, type)
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#endif
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struct thread_entry*
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create_thread(void (*function)(void), void* stack, int stack_size,
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const char *name IF_PRIO(, int priority));
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struct thread_entry*
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create_thread_on_core(unsigned int core, void (*function)(void),
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void* stack, int stack_size,
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const char *name
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IF_PRIO(, int priority));
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#ifdef HAVE_SCHEDULER_BOOSTCTRL
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void trigger_cpu_boost(void);
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#else
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#define trigger_cpu_boost()
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#endif
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void remove_thread(struct thread_entry *thread);
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void switch_thread(bool save_context, struct thread_entry **blocked_list);
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void sleep_thread(int ticks);
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void block_thread(struct thread_entry **thread, int timeout);
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void wakeup_thread(struct thread_entry **thread);
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#ifdef HAVE_PRIORITY_SCHEDULING
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int thread_set_priority(struct thread_entry *thread, int priority);
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int thread_get_priority(struct thread_entry *thread);
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#endif
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void init_threads(void);
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int thread_stack_usage(const struct thread_entry *thread);
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int thread_get_status(const struct thread_entry *thread);
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#ifdef RB_PROFILE
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void profile_thread(void);
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#endif
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#endif
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