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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [isdn/] [eicon/] [log.c] - Rev 1765
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/* * Source file for diva log facility * * Copyright (C) Eicon Technology Corporation, 2000. * * Eicon File Revision : 1.5 * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * */ #include "sys.h" #include "idi.h" #include "divas.h" #include "adapter.h" #include "divalog.h" #include "uxio.h" /*Counter to monitor number of messages */ static int m_count; #define MAX_BUFFERED_MSGS (1000) /* Our Linked List Structure to hold message */ typedef struct klog_link{ klog_t klog; struct klog_link *next; }KNODE; /* First & Last structures in list*/ KNODE *head; KNODE *tail; /* * retrieve message from FIFO buffer * returns NULL if buffer empty * otherwise returns pointer to entry */ char *DivasLogFifoRead(void) { KNODE *old_head; if(head==NULL) { /* Buffer Empty - No Messages */ return NULL; } m_count--; /* Keep track of message to be read & increment to next message*/ old_head = head; head = head->next; /*Return ptr to Msg */ return((char *)old_head); } /* * write message into FIFO buffer */ void DivasLogFifoWrite(char *entry, int length) { KNODE *new_klog; if(head == NULL) { /* No Entries in Log */ tail=NULL; m_count=0; new_klog=UxAlloc(sizeof(KNODE)); if(new_klog==NULL) { return; } m_count++; memset(new_klog, 0, sizeof(KNODE)); /* Set head & tail to point to the new Msg Struct */ head=tail=new_klog; tail->next=NULL; } else { new_klog=UxAlloc(sizeof(KNODE)); if(new_klog==NULL) { return; } m_count++; memset(new_klog, 0, sizeof(KNODE)); /* Let last Msg Struct point to new Msg Struct & inc tail */ tail->next=new_klog; tail=new_klog; tail->next=NULL; } if (length > sizeof(klog_t)) { length = sizeof(klog_t); } memcpy(&tail->klog, entry, length); return; } /* * DivaslogFifoEmpty:return TRUE if FIFO buffer is empty,otherwise FALSE */ int DivasLogFifoEmpty(void) { return (m_count == 0); } /* *DivasLogFifoFull:return TRUE if FIFO buffer is full,otherwise FALSE */ int DivasLogFifoFull(void) { return (m_count == MAX_BUFFERED_MSGS); } /* * generate an IDI log entry */ void DivasLogIdi(card_t *card, ENTITY *e, int request) { klog_t klog; memset(&klog, 0, sizeof(klog)); klog.time_stamp = UxTimeGet(); klog.length = sizeof(ENTITY) > sizeof(klog.buffer) ? sizeof(klog.buffer) : sizeof(ENTITY); klog.card = (int) (card - DivasCards); klog.type = request ? KLOG_IDI_REQ : KLOG_IDI_CALLBACK; klog.code = 0; memcpy(klog.buffer, e, klog.length); /* send to the log driver and return */ DivasLogAdd(&klog, sizeof(klog)); return; }