106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*****************************************************************************\
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** **
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** Linux Call Route **
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** **
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**---------------------------------------------------------------------------**
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** Copyright: Andreas Eversberg **
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** **
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** message handling **
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** **
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\*****************************************************************************/
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#include "main.h"
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MESSAGES
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struct lcr_msg *message_first = NULL;
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struct lcr_msg **messagepointer_end = &message_first;
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/* creates a new message with the given attributes. the message must be filled then. after filling, the message_put must be called */
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struct lcr_msg *message_create(int id_from, int id_to, int flow, int type)
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{
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struct lcr_msg *message;
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message = (struct lcr_msg *)MALLOC(sizeof(struct lcr_msg));
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if (!message)
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FATAL("No memory for message.\n");
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mmemuse++;
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message->id_from = id_from;
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message->id_to = id_to;
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message->flow = flow;
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message->type = type;
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return(message);
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}
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/* attaches a message to the end of the message chain */
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void message_put(struct lcr_msg *message)
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{
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if (message->id_to == 0)
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{
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PDEBUG(DEBUG_MSG, "message %s not written, because destination is 0.\n", messages_txt[message->type]);
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message_free(message);
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return;
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}
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if ((options.deb&DEBUG_MSG) && message->type != MESSAGE_DATA)
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PDEBUG(DEBUG_MSG, "message %s written from %ld to %ld (memory %x)\n", messages_txt[message->type], message->id_from, message->id_to, message);
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*messagepointer_end = message;
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messagepointer_end = &(message->next);
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}
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struct lcr_msg *message_forward(int id_from, int id_to, int flow, union parameter *param)
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{
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struct lcr_msg *message;
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/* get point to message */
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message = (struct lcr_msg *)((unsigned long)param - ((unsigned long)(&message->param) - (unsigned long)message));
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/* protect, so forwarded messages are not freed after handling */
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message->keep = 1;
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message->id_from = id_from;
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message->id_to = id_to;
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message->flow = flow;
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message_put(message);
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return(message);
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}
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/* detaches the first messages from the message chain */
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struct lcr_msg *message_get(void)
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{
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struct lcr_msg *message;
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if (!message_first)
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{
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return(0);
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}
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message = message_first;
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message_first = message->next;
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if (!message_first)
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messagepointer_end = &message_first;
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message->keep = 0;
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if ((options.deb&DEBUG_MSG) && message->type != MESSAGE_DATA)
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PDEBUG(DEBUG_MSG, "message %s reading from %ld to %ld (memory %x)\n", messages_txt[message->type], message->id_from, message->id_to, message);
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return(message);
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}
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/* free a message */
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void message_free(struct lcr_msg *message)
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{
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if (message->keep)
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return;
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FREE(message, sizeof(struct lcr_msg));
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mmemuse--;
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}
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