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annotate include/mb_backend.h @ 1019:1a3cc22ee1bd refine_backend_if

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Fix testcase of animate.c for mb_timer_man_t
author Thinker K.F. Li <thinker@codemud.net>
date Mon, 22 Nov 2010 13:52:59 +0800
parents 9b5d4839c5bb
children 84006acab6af
rev   line source
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1 #ifndef __MB_BACKEND_H_
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2 #define __MB_BACKEND_H_
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3
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4 #include "mb_redraw_man.h"
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5 #include "mb_timer.h"
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6 #include "mb_observer.h"
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7 #include "mb_img_ldr.h"
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8
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9 #include "mb_config.h"
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10
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11 #ifdef X_BACKEND
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12 #include "mb_X_supp.h"
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13 #endif
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14
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15 #ifdef DFB_BACKEND
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16 #inclde "mb_dfb_supp.h"
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17 #endif
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18
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19 typedef void mb_rt_t;
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20
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21 typedef struct _mb_timer_man mb_timer_man_t;
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22 typedef struct _mb_timer_factory mb_timer_factory_t;
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23 typedef struct _mb_IO_man mb_IO_man_t;
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24 typedef struct _mb_IO_factory mb_IO_factory_t;
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25 typedef enum _MB_IO_TYPE MB_IO_TYPE;
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26
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27 /*! \brief Function signature of callback functions for IO requests.
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28 */
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29 typedef void (*mb_IO_cb_t)(int hdl, int fd, MB_IO_TYPE type, void *data);
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30
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31 /*! \brief The backend engine mb_backend_t is used to define the
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32 * interface to realize the MB.
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33 *
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34 * A backend is used to receive events from the system. The MB does
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35 * not define the backend by itself. Instead, it define an interface
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36 * which allow the lower layer to implement the event system. Each
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37 * backend need to provides the following events.
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38 *
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39 * - keyboard event
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40 * - timer event
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41 * - image loader(?)
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42 * - render manager(?)
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43 */
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44 typedef struct {
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45 mb_rt_t *(*new)(const char *display, int w,int h);
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46 mb_rt_t *(*new_with_win)(MB_DISPLAY display, MB_WINDOW win);
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47
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48 void (*free)(mb_rt_t *rt);
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49 void (*free_keep_win)(mb_rt_t *rt);
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50 /*! \brief Request the backend to start monitoring a file descriptor.
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51 *
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52 * This is used only when the backend is responsible for event loop.
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53 */
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54 int (*add_event)(mb_rt_t *rt, int fd, MB_IO_TYPE type,
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55 mb_IO_cb_t f,void *arg);
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56 /*! \brief Request the backend to stop monitoring a file descriptor.
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57 *
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58 * This is used only when the backend is responsible for event loop.
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59 */
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60 void (*remove_event)(mb_rt_t *rt, int hdl);
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61 /*! \brief Event Loop
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62 *
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63 * This is called when main application does not handle event
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64 * loop. Or, it should register an IO factory (i.e \ref
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65 * mb_IO_factory_t) with the backend.
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66 */
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67 void (*event_loop)(mb_rt_t *rt);
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68
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69 /*! \brief Flush requests to screen server if existed */
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70 int (*flush)(mb_rt_t *rt);
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71
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72 subject_t *(*kbevents)(mb_rt_t *rt);
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73 redraw_man_t *(*rdman)(mb_rt_t *rt);
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74 mb_timer_man_t *(*timer_man)(mb_rt_t *rt);
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75 ob_factory_t *(*ob_factory)(mb_rt_t *rt);
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76 mb_img_ldr_t *(*loader)(mb_rt_t *rt);
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77
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78 /*
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79 * Following two methods are used to integrate a backend to
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80 * event loop of main application.
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81 */
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82 void (*reg_IO_factory)(mb_IO_factory_t *evman);
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83 void (*reg_timer_factory)(mb_timer_factory_t *evman);
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84 } mb_backend_t;
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85
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86 extern mb_backend_t backend;
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87
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88 /*! \brief Type of IO that registered with an IO manager.
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89 */
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90 enum _MB_IO_TYPE {MB_IO_DUMMY, MB_IO_R, MB_IO_W, MB_IO_RW};
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91
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92 /*! \brief IO Manager
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93 */
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94 struct _mb_IO_man {
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95 int (*reg)(struct _mb_IO_man *io_man,
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96 int fd, MB_IO_TYPE type, mb_IO_cb_t cb, void *data);
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97 void (*unreg)(struct _mb_IO_man *io_man,
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98 int io_hdl);
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99 };
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100
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101 /*! \brief Factory of IO managers.
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102 */
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103 struct _mb_IO_factory {
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104 mb_IO_man_t *(*new)(void);
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105 void (*free)(mb_IO_man_t *io_man);
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106 };
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107
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108 /*! \brief Function signature of callback functions for timers.
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109 */
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110 typedef void (*mb_timer_cb_t)(int hdl,
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111 const mb_timeval_t *tmo,
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112 const mb_timeval_t *now,
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113 void *data);
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114
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115 /*! \brief Timer manager
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116 */
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117 struct _mb_timer_man {
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118 /*! \brief Setup a timeout callback.
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119 *
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120 * \return -1 for error.
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121 */
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122 int (*timeout)(struct _mb_timer_man *tm_man,
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123 mb_timeval_t *tmout, /* tiemout (wall time) */
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124 mb_timer_cb_t cb, void *data);
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125 /*! \brief Remove a timeout request.
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126 *
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127 * \param tm_hdl is the handle returned by _mb_timer_man::timeout.
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128 */
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129 void (*remove)(struct _mb_timer_man *tm_man, int tm_hdl);
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130 };
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131
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132 /*! \brief Factory of timer manager.
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133 */
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134 struct _mb_timer_factory {
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135 mb_timer_man_t *(*new)(void);
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136 void (*free)(mb_timer_man_t *timer_man);
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137 };
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138
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139 #define mb_timer_man_timeout(tm_man, tmout, cb, data) \
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140 (tm_man)->timeout((tm_man), (tmout), (cb), (data))
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141 #define mb_timer_man_remove(tm_man, tm_hdl) \
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142 (tm_man)->remove((tm_man), (tm_hdl))
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143 #define mb_timer_man_new(tm_fact) (tm_fact)->new()
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144 #define mb_timer_man_free(tm_fact, tm_man) (tm_fact)->free(tm_man)
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145
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146 #endif /* __MB_BACKEND_H_ */