root / prex-0.9.0 / sys / include / thread.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2005-2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #ifndef _THREAD_H
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31 | #define _THREAD_H
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32 | |||
33 | #include <types.h> |
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34 | #include <sys/cdefs.h> |
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35 | #include <sys/queue.h> |
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36 | #include <sys/list.h> |
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37 | #include <sys/sysinfo.h> |
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38 | #include <event.h> |
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39 | #include <timer.h> |
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40 | #include <hal.h> |
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41 | |||
42 | /*
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43 | * Description of a thread.
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44 | */
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45 | struct thread {
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46 | struct list link; /* linkage on all threads */ |
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47 | struct list task_link; /* linkage on thread list in task */ |
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48 | struct queue sched_link; /* linkage on scheduling queue */ |
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49 | task_t task; /* task to which I belong */
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50 | int state; /* thread state */ |
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51 | int policy; /* scheduling policy */ |
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52 | int priority; /* current priority */ |
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53 | int basepri; /* statical base priority */ |
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54 | int timeleft; /* remaining ticks to run */ |
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55 | u_int time; /* total running time */
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56 | int resched; /* true if rescheduling is needed */ |
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57 | int locks; /* schedule lock counter */ |
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58 | int suscnt; /* suspend count */ |
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59 | struct event *slpevt; /* event we are waiting on */ |
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60 | int slpret; /* return value for sched_tleep */ |
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61 | struct timer timeout; /* thread timer */ |
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62 | struct timer *periodic; /* pointer to periodic timer */ |
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63 | uint32_t excbits; /* bitmap of pending exceptions */
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64 | struct list mutexes; /* mutexes locked by this thread */ |
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65 | mutex_t mutex_waiting; /* mutex pointer currently waiting */
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66 | struct queue ipc_link; /* linkage on IPC queue */ |
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67 | void *msgaddr; /* kernel address of IPC message */ |
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68 | size_t msgsize; /* size of IPC message */
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69 | thread_t sender; /* thread that sends IPC message */
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70 | thread_t receiver; /* thread that receives IPC message */
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71 | object_t sendobj; /* IPC object sending to */
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72 | object_t recvobj; /* IPC object receiving from */
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73 | void *kstack; /* base address of kernel stack */ |
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74 | struct context ctx; /* machine specific context */ |
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75 | }; |
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76 | |||
77 | /*
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78 | * Thread state
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79 | */
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80 | #define TS_RUN 0x00 /* running or ready to run */ |
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81 | #define TS_SLEEP 0x01 /* awaiting an event */ |
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82 | #define TS_SUSP 0x02 /* suspend count is not 0 */ |
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83 | #define TS_EXIT 0x04 /* terminated */ |
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84 | |||
85 | /*
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86 | * Sleep result
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87 | */
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88 | #define SLP_SUCCESS 0 /* success */ |
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89 | #define SLP_BREAK 1 /* break due to some reasons */ |
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90 | #define SLP_TIMEOUT 2 /* timeout */ |
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91 | #define SLP_INVAL 3 /* target event becomes invalid */ |
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92 | #define SLP_INTR 4 /* interrupted by exception */ |
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93 | |||
94 | /*
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95 | * Scheduling operations for thread_schedparam().
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96 | */
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97 | #define SOP_GETPRI 0 /* get scheduling priority */ |
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98 | #define SOP_SETPRI 1 /* set scheduling priority */ |
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99 | #define SOP_GETPOLICY 2 /* get scheduling policy */ |
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100 | #define SOP_SETPOLICY 3 /* set scheduling policy */ |
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101 | |||
102 | __BEGIN_DECLS |
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103 | int thread_create(task_t, thread_t *);
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104 | int thread_terminate(thread_t);
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105 | void thread_destroy(thread_t);
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106 | int thread_load(thread_t, void (*)(void), void *); |
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107 | thread_t thread_self(void);
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108 | int thread_valid(thread_t);
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109 | void thread_yield(void); |
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110 | int thread_suspend(thread_t);
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111 | int thread_resume(thread_t);
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112 | int thread_schedparam(thread_t, int, int *); |
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113 | void thread_idle(void); |
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114 | int thread_info(struct threadinfo *); |
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115 | thread_t kthread_create(void (*)(void *), void *, int); |
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116 | void kthread_terminate(thread_t);
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117 | void thread_init(void); |
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118 | __END_DECLS |
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119 | |||
120 | #endif /* !_THREAD_H */ |