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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Jan Hudecek |
2 | * Copyright (c) 2007 Jan Hudecek |
3 | * Copyright (c) 2006 Jakub Jermar |
3 | * Copyright (c) 2006 Jakub Jermar |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | /** @addtogroup genericddi |
30 | /** @addtogroup genericddi |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** @file |
33 | /** @file tasklet.h |
- | 34 | * @brief Tasklets declarations |
|
34 | */ |
35 | */ |
35 | 36 | ||
36 | #ifndef KERN_TASKLET_H_ |
37 | #ifndef KERN_TASKLET_H_ |
37 | #define KERN_TASKLET_H_ |
38 | #define KERN_TASKLET_H_ |
38 | 39 | ||
39 | #include <arch/types.h> |
40 | #include <arch/types.h> |
40 | #include <proc/task.h> |
41 | #include <proc/task.h> |
41 | 42 | ||
42 | 43 | ||
43 | 44 | ||
44 | /** Structure describing a tasklet*/ |
45 | /** Structure describing a tasklet*/ |
45 | typedef struct tasklet_descriptor { |
46 | typedef struct tasklet_descriptor { |
46 | /** callback to call */ |
47 | /** callback to call */ |
47 | void (*func)(void* data); |
48 | void (*func)(void* data); |
48 | /** parameters to pass to func */ |
49 | /** parameters to pass to func */ |
49 | void* data; |
50 | void* data; |
50 | /** state of the tasklet one of tasklet_state_enum */ |
51 | /** state of the tasklet one of tasklet_state_enum */ |
51 | uint32_t state; |
52 | uint32_t state; |
52 | struct tasklet_descriptor *next; |
53 | struct tasklet_descriptor *next; |
53 | } tasklet_descriptor_t; |
54 | } tasklet_descriptor_t; |
54 | 55 | ||
55 | /** Initializes tasklets - except for the tasklet thread */ |
56 | /** Initializes tasklets - except for the tasklet thread */ |
56 | void tasklet_init(void); |
57 | void tasklet_init(void); |
57 | 58 | ||
58 | /** |
59 | /** |
59 | * Creates and runs the tasklet thread |
60 | * Creates and runs the tasklet thread |
60 | * |
61 | * |
61 | * @param kernel_task Pointer to the kernel task - for create_thread |
62 | * @param kernel_task Pointer to the kernel task - for create_thread |
62 | */ |
63 | */ |
63 | void tasklet_run_tasklet_thread(task_t * kernel_task); |
64 | void tasklet_run_tasklet_thread(task_t * kernel_task); |
64 | 65 | ||
65 | /** Thread which keeps executing scheduled enabled tasklets |
66 | /** Thread which keeps executing scheduled enabled tasklets |
66 | * @param data not used |
67 | * @param data not used |
67 | */ |
68 | */ |
68 | void tasklet_thread(void* data); |
69 | void tasklet_thread(void* data); |
69 | 70 | ||
70 | 71 | ||
71 | /** Executes scheduled enabled tasklets */ |
72 | /** Executes scheduled enabled tasklets */ |
72 | void tasklet_do(void); |
73 | void tasklet_do(void); |
73 | 74 | ||
74 | /** Initializes tasklet structure |
75 | /** Initializes tasklet structure |
75 | * @param func tasklet callback function to be called |
76 | * @param func tasklet callback function to be called |
76 | * @param data pointer to be passed to the tasklet function |
77 | * @param data pointer to be passed to the tasklet function |
77 | */ |
78 | */ |
78 | tasklet_descriptor_t* tasklet_register(void (*func)(void* data), void* data); |
79 | tasklet_descriptor_t* tasklet_register(void (*func)(void* data), void* data); |
79 | 80 | ||
80 | /** Schedules the tasklet for execution on current CPU |
81 | /** Schedules the tasklet for execution on current CPU |
81 | * @param t tasklet to be scheduled |
82 | * @param t tasklet to be scheduled |
82 | */ |
83 | */ |
83 | void tasklet_schedule(tasklet_descriptor_t* t); |
84 | void tasklet_schedule(tasklet_descriptor_t* t); |
84 | 85 | ||
85 | 86 | ||
86 | /** Schedules the tasklet for execution on id CPU |
87 | /** Schedules the tasklet for execution on id CPU |
87 | * @param t tasklet to be scheduled |
88 | * @param t tasklet to be scheduled |
88 | * @param id CPU id on which the tasklet will be scheduled |
89 | * @param id CPU id on which the tasklet will be scheduled |
89 | */ |
90 | */ |
90 | void tasklet_schedule_SMP(tasklet_descriptor_t* t, uint32_t id); |
91 | void tasklet_schedule_SMP(tasklet_descriptor_t* t, uint32_t id); |
91 | 92 | ||
92 | /** Tasklet will not be run, even if scheduled |
93 | /** Tasklet will not be run, even if scheduled |
93 | * @param t tasklet to be disabled |
94 | * @param t tasklet to be disabled |
94 | */ |
95 | */ |
95 | void tasklet_disable(tasklet_descriptor_t* t); |
96 | void tasklet_disable(tasklet_descriptor_t* t); |
96 | 97 | ||
97 | /** Tasklet will be run if scheduled |
98 | /** Tasklet will be run if scheduled |
98 | * @param t tasklet to be enabled |
99 | * @param t tasklet to be enabled |
99 | */ |
100 | */ |
100 | void tasklet_enable(tasklet_descriptor_t* t); |
101 | void tasklet_enable(tasklet_descriptor_t* t); |
101 | 102 | ||
102 | /** Frees the tasklet structure when no longer needed. The function doesn't provide |
103 | /** Frees the tasklet structure when no longer needed. The function doesn't provide |
103 | * any synchronization, the caller must be sure, the tasklet is not scheduled. |
104 | * any synchronization, the caller must be sure, the tasklet is not scheduled. |
104 | * |
105 | * |
105 | * @param tasklet to be freed |
106 | * @param tasklet to be freed |
106 | */ |
107 | */ |
107 | void tasklet_free(tasklet_descriptor_t* t); |
108 | void tasklet_free(tasklet_descriptor_t* t); |
108 | 109 | ||
109 | 110 | ||
110 | #endif |
111 | #endif |
111 | 112 | ||
112 | /** @} |
113 | /** @} |
113 | */ |
114 | */ |
114 | 115 |