1 #include "log.h" 2 3 /* State management variables. */ 4 #define NR_DEVS 1 /* number of minor devices */ 5 EXTERN struct logdevice logdevices[NR_DEVS]; 6 7 /* State management helpers. */ 8 static int is_read_pending; 9 static int is_select_callback_pending; 10 static void load_state_info(void) 11 { 12 int i, found_pending; 13 struct logdevice *log; 14 15 /* Check if reads or select callbacks are pending. */ 16 is_read_pending = FALSE; 17 is_select_callback_pending = FALSE; 18 found_pending = FALSE; 19 for (i = 0; i < NR_DEVS && !found_pending; i++) { 20 log = &logdevices[i]; 21 if(log->log_source != NONE) { 22 is_read_pending = TRUE; 23 } 24 if(log->log_selected) { 25 is_select_callback_pending = TRUE; 26 } 27 28 found_pending = (is_read_pending && is_select_callback_pending); 29 } 30 } 31 32 /* Custom states definition. */ 33 #define LOG_STATE_SELECT_PROTOCOL_FREE (SEF_LU_STATE_CUSTOM_BASE + 0) 34 #define LOG_STATE_IS_CUSTOM(s) ((s) == LOG_STATE_SELECT_PROTOCOL_FREE) 35 36 /*===========================================================================* 37 * sef_cb_lu_prepare * 38 *===========================================================================*/ 39 int sef_cb_lu_prepare(int state) 40 { 41 int is_ready; 42 43 /* Load state information. */ 44 load_state_info(); 45 46 /* Check if we are ready for the target state. */ 47 is_ready = FALSE; 48 switch(state) { 49 /* Standard states. */ 50 case SEF_LU_STATE_REQUEST_FREE: 51 is_ready = (!is_read_pending); 52 break; 53 54 case SEF_LU_STATE_PROTOCOL_FREE: 55 is_ready = (!is_read_pending && !is_select_callback_pending); 56 break; 57 58 /* Custom states. */ 59 case LOG_STATE_SELECT_PROTOCOL_FREE: 60 is_ready = (!is_select_callback_pending); 61 break; 62 } 63 64 /* Tell SEF if we are ready. */ 65 return is_ready ? OK : ENOTREADY; 66 } 67 68 /*===========================================================================* 69 * sef_cb_lu_state_isvalid * 70 *===========================================================================*/ 71 int sef_cb_lu_state_isvalid(int state, int UNUSED(flags)) 72 { 73 return SEF_LU_STATE_IS_STANDARD(state) || LOG_STATE_IS_CUSTOM(state); 74 } 75 76 /*===========================================================================* 77 * sef_cb_lu_state_dump * 78 *===========================================================================*/ 79 void sef_cb_lu_state_dump(int state) 80 { 81 /* Load state information. */ 82 load_state_info(); 83 84 sef_lu_dprint("log: live update state = %d\n", state); 85 sef_lu_dprint("log: is_read_pending = %d\n", is_read_pending); 86 sef_lu_dprint("log: is_select_callback_pending = %d\n", 87 is_select_callback_pending); 88 89 sef_lu_dprint("log: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n", 90 SEF_LU_STATE_WORK_FREE, TRUE); 91 sef_lu_dprint("log: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n", 92 SEF_LU_STATE_REQUEST_FREE, (!is_read_pending)); 93 sef_lu_dprint("log: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n", 94 SEF_LU_STATE_PROTOCOL_FREE, (!is_read_pending 95 && !is_select_callback_pending)); 96 sef_lu_dprint("log: LOG_STATE_SELECT_PROTOCOL_FREE(%d) reached = %d\n", 97 LOG_STATE_SELECT_PROTOCOL_FREE, (!is_select_callback_pending)); 98 } 99 100