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/********************************************************************
* Copyright (C) 2009 Motorola, All Rights Reserved
*
* File Name: rambuf.c
*
* General Description: This file provides RAM buffer functionality
*
* This program is licensed under a BSD license with the following terms:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* o Neither the name of Motorola nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Revision History
* Date Author Description
* ---------- -------------- ------------------------------------------
* 02/19/2009 Motorola Initial creation
*
*********************************************************************/
/* Includes */
/* Lib C includes */
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <fcntl.h>
#include <log/logger.h>
#include <log/logd.h>
#include <log/logprint.h>
/* Aplogd includes */
#include "rambuf.h"
#include "aplogd.h"
//#include "aplogd_util.h"
#include "log_io.h"
#include "rambuf.h"
/* Macros */
int aplogd_ram_buff_size = 8*1024;
char *aplogd_ram_buffer = NULL;
/* Functions */
/* aplogd_rambuf_init()
*
* Description: This function performs the necessary setup for the RAM buffer
*
* Return: (int) 0 on success
*
* Notes: None
*/
int aplogd_rambuf_init(void)
{
DPRINT("Initializing ram buffer\n");
int i;
aplogd_ram_buffer = (char *)malloc(aplogd_ram_buff_size * (APLOGD_INPUT_LAST +1));
if(!aplogd_ram_buffer)
exit(EXIT_FAILURE);
for (i = 0; i <=APLOGD_INPUT_LAST ; i++){
aplogd_io_array[i].input_buf_base = aplogd_ram_buffer + i * aplogd_ram_buff_size;
aplogd_io_array[i].input_buf = aplogd_io_array[i].input_buf_base;
}
return 0;
}
/* aplogd_rambuf_destroy()
*
* Description: Cleans up RAM buf specific items
*
* Return: None
*
* Notes: None
*/
void aplogd_rambuf_destroy(void)
{
int i;
for (i = 0; i < APLOGD_MAX_IO_FDS; i++){
aplogd_io_array[i].input_buf_base = NULL;
}
free(aplogd_ram_buffer);
return;
}
/* aplogd_rambuf_space()
*
* Description: This function returns the amount of free space in the buffer
*
* @buffer_type: (int) whether to get the size of the input or output buffer
*
* Return: (int) amount of free space in the buffer; -1 on failure
*
* Notes: The rambuf lock must be held before calling this function.
*/
int aplogd_rambuf_space(int index)
{
int temp_filled = aplogd_rambuf_bytes_filled(index);
if (temp_filled < 0 || temp_filled > aplogd_ram_buff_size)
{
WPRINT("Could not get bytes filled\n");
return -1;
}
return (aplogd_ram_buff_size - temp_filled);
}
/* aplogd_rambuf_bytes_filled()
*
* Description: This function returns the number of bytes that are free in a
* buffer
*
* @buffer_type: (int) input or output buffer choice
*
* Return: (int) number of bytes filled in the buffer
*
* Notes: Rambuf lock must be held before calling this function
*/
int aplogd_rambuf_bytes_filled(int index)
{
int ret_val = -1;
ret_val = (aplogd_io_array[index].input_buf - aplogd_io_array[index].input_buf_base);
return ret_val;
}
/* aplogd_rambuf_output()
*
* Description: This function calls the associated writev to the passed output
* struct
*
* @index: pointer to the input/output file
*
* Output: (int) 0 on full write; -1 on partial or no write
*
* Notes: This function will cleanup this list after outputting its contents;
* it should only be called when you are ready to output data.
*/
int aplogd_rambuf_output(int index)
{
int ret_val = 0;
int need_written = 0;
int size_written = 0;
/* From here on out we can only manipulate the output list */
VPRINT("output index:%d\n", index );
need_written=aplogd_rambuf_bytes_filled(index);
VPRINT("need_written=%d.\n",need_written);
if(!aplogd_io_array[index].input_buf_base || !(need_written >0))
{
return -1;
}
if (aplogd_io_array[index].output_fd < 0)
{
WPRINT("output fd hasn't been initialized.\n");
aplogd_io_array[index].input_buf = aplogd_io_array[index].input_buf_base;
ret_val = -1;
return ret_val;
}
while(need_written >0) {
size_written = write(aplogd_io_array[index].output_fd, (void*)aplogd_io_array[index].input_buf_base, need_written);
if (size_written < 0 )
{
EPRINT("output write: size_written=%d, errno=%d\n", size_written, errno);
if (ENOSPC == errno)
aplogd_close_output();
if (EBADF == errno)
aplogd_io_array[index].output_fd=-1;
ret_val=-1;
return ret_val;
}
need_written -= size_written;
total_write_size+=size_written;
}
aplogd_io_array[index].input_buf = aplogd_io_array[index].input_buf_base;
if (total_write_size >=aplogd_logfile_max)
{
ALOGI("aplogd_logfile_max=%d, total_write_size=%d\n",aplogd_logfile_max, total_write_size);
aplogd_close_output();
aplogd_io_backupall(g_current_storage);
aplogd_output_setup(g_current_storage);
total_write_size=0;
}
return ret_val;
}
void aplogd_rambuf_outputall()
{
int i;
for (i=0;i<=APLOGD_INPUT_LAST;i++)
aplogd_rambuf_output(i);
}
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