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annotate include/mb_backend.h @ 1005:714169f33f13 refine_backend_if

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Fix X_init_connection() to match modification of mb_backend_t
author Thinker K.F. Li <thinker@codemud.net>
date Mon, 22 Nov 2010 00:42:30 +0800
parents 734ba9161be4
children 595a06fc0157
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
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26 /*! \brief The backend engine mb_backend_t is used to define the
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27 * interface to realize the MB.
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28 *
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29 * A backend is used to receive events from the system. The MB does
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30 * not define the backend by itself. Instead, it define an interface
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31 * which allow the lower layer to implement the event system. Each
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32 * backend need to provides the following events.
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33 *
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34 * - keyboard event
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35 * - timer event
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36 * - image loader(?)
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37 * - render manager(?)
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38 */
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39 typedef struct {
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40 mb_rt_t *(*new)(const char *display, int w,int h);
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41 mb_rt_t *(*new_with_win)(const char *display, MB_WINDOW win, int w,int h);
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42
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43 void (*free)(mb_rt_t *rt);
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44 /*! \brief Request the backend to start monitoring a file descriptor.
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45 *
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46 * This is used only when the backend is responsible for event loop.
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47 */
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48 void (*add_event)(mb_rt_t *rt,int type, int fd, mb_eventcb_t f,void *arg);
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49 /*! \brief Request the backend to stop monitoring a file descriptor.
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50 *
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51 * This is used only when the backend is responsible for event loop.
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52 */
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53 void (*remove_event)(mb_rt_t *rt,int type, int fd);
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54 /*! \brief Event Loop
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55 *
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56 * This is called when main application does not handle event
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57 * loop. Or, it should register an IO factory (i.e \ref
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58 * mb_IO_factory_t) with the backend.
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59 */
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60 void (*event_loop)(mb_rt_t *rt);
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61
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62 subject_t *(*kbevents)(mb_rt_t *rt);
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63 redraw_man_t *(*rdman)(mb_rt_t *rt);
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64 mb_timer_man_t *(*timer_man)(mb_rt_t *rt);
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65 ob_factory_t *(*ob_factory)(mb_rt_t *rt);
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66 mb_img_ldr_t *(*loader)(mb_rt_t *rt);
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67
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68 /*
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69 * Following two methods are used to integrate a backend to
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70 * event loop of main application.
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71 */
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72 void (*reg_IO_factory)(mb_IO_factory_t *evman);
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73 void (*reg_timer_factory)(mb_timer_factory_t *evman);
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74 } mb_backend_t;
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75
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76 extern mb_backend_t backend;
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77
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78 /*! \brief Type of IO that registered with an IO manager.
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79 */
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80 enum _MB_IO_TYPE {MB_IO_DUMMY, MB_IO_R, MB_IO_W, MB_IO_RW};
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81 typedef enum _MB_IO_TYPE MB_IO_TYPE;
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82
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83 /*! \brief Function signature of callback functions for IO requests.
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84 */
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85 typedef void (*mb_IO_cb_t)(int hdl, int fd, MB_IO_TYPE type, void *data);
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86
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87 /*! \brief IO Manager
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88 */
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89 struct _mb_IO_man {
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90 int (*reg)(struct _mb_IO_man *io_man,
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91 int fd, MB_IO_TYPE type, mb_IO_cb_t cb, void *data);
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92 void (*unreg)(struct _mb_IO_man *io_man,
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93 int io_hdl);
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94 };
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95
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96 /*! \brief Factory of IO managers.
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97 */
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98 struct _mb_IO_factory {
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99 mb_IO_man_t *(*new)(void);
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100 void (*free)(mb_IO_man_t *io_man);
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101 };
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102
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103 /*! \brief Function signature of callback functions for timers.
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104 */
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105 typedef void (*mb_timer_cb_t)(int hdl,
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106 const mb_timeval_t *tmo,
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107 const mb_timeval_t *now,
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108 void *data);
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109
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110 /*! \brief Timer manager
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111 */
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112 struct _mb_timer_man {
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113 int (*timeout)(struct _mb_timer_man *tm_man,
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114 mb_timeval_t *tmout, /* tiemout (wall time) */
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115 mb_timer_cb_t cb, void *data);
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116 /*! \brief Remove a timeout request.
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117 *
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118 * \param tm_hdl is the handle returned by _mb_timer_man::timeout.
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119 */
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120 void (*remove)(struct _mb_timer_man *tm_man, int tm_hdl);
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121 };
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122
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123 /*! \brief Factory of timer manager.
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124 */
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125 struct _mb_timer_factory {
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126 mb_timer_man_t *(*new)(void);
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127 void (*free)(mb_timer_man_t *timer_man);
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128 };
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129
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130 #endif /* __MB_BACKEND_H_ */