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/*
* File Name: main.c
* Workflow: prepare serial port, create MQ, SHM, child threads,
* register SIGINT to shutdown demo, recycle IPC waste.
* Return Value: 0, normal exit. -1, erroneous exit.
*/
/* Header files */
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "debug.h"
#include "proto.h"
#include "uart_api.h"
/* external threads */
extern void *pthread_gprs(void *args);
extern void *pthread_fan(void *args);
extern void *pthread_dht11(void *args);
/* global variables*/
pthread_t id_dht11, id_fan, id_gprs;
pthread_mutex_t mutex_zigbee_coordinator, mutex_gprs;
volatile sig_atomic_t should_exit = 0;
/* functions */
static void cleanThreadsHandler(int signum);
/* main */
int main(void) {
int *p_coordinator_fd = malloc(sizeof(int));
int retVal;
int *p_gprs_fd = malloc(sizeof(int));
key_t *p_shm_key = malloc(sizeof(key_t));
key_t *p_msg_key = malloc(sizeof(key_t));
int *p_shm_id = malloc(sizeof(int));
int *p_msg_id = malloc(sizeof(int));
ARG_STRUCT *p_dht11_resource_struct = malloc(sizeof(ARG_STRUCT));
ARG_STRUCT *p_fan_resource_struct = malloc(sizeof(ARG_STRUCT));
ARG_STRUCT *p_gprs_resource_struct = malloc(sizeof(ARG_STRUCT));
// prepare serial communication
if ((*p_coordinator_fd = open_port("/dev/ttyUSB0")) == -1) {
fprintf(stderr, "[%s:%d] open_port: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Get zigbee coordinator fd: %d.\n", __FUNCTION__,
__LINE__, *p_coordinator_fd);
if ((retVal = set_comfig(*p_coordinator_fd, 115200)) != 0) {
fprintf(stderr, "[%s:%d] set_comfig: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Set Zigbee coordinator serial config with "
"return value: %d.\n",
__FUNCTION__, __LINE__, retVal);
if ((*p_gprs_fd = open_port("/dev/ttyUSB1")) == -1) {
fprintf(stderr, "[%s:%d] open_port: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Get GPRS fd : %d.\n", __FUNCTION__, __LINE__,
*p_gprs_fd);
if ((retVal = set_comfig(*p_gprs_fd, 9600)) != 0) {
fprintf(stderr, "[%s:%d] set_comfig: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog(
"[DEBUG-INFO %s:%d]: Set GPRS serial config with return value: %d.\n",
__FUNCTION__, __LINE__, retVal);
// prepare IPC
if ((*p_shm_key = ftok("/usr/bin/boa", 'm')) == -1) {
fprintf(stderr, "[%s:%d] ftok: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Generate shared memory key : %d.\n",
__FUNCTION__, __LINE__, *p_shm_key);
if ((*p_msg_key = ftok("/usr/bin/boa", 'q')) == -1) {
fprintf(stderr, "[%s:%d] ftok: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Generate message queue key: %d.\n",
__FUNCTION__, __LINE__, *p_msg_key);
if ((*p_shm_id = shmget(*p_shm_key, sizeof(SHM_STRUCT),
IPC_CREAT | IPC_EXCL | 0600)) == -1) {
fprintf(stderr, "[%s:%d] shmget: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Generate shared memory id: %d.\n", __FUNCTION__,
__LINE__, *p_shm_id);
if ((*p_msg_id = msgget(*p_msg_key, IPC_CREAT | IPC_EXCL | 0600)) == -1) {
fprintf(stderr, "[%s:%d] msgget: %s", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Generate message queue id: %d.\n", __FUNCTION__,
__LINE__, *p_msg_id);
// register SIGINT to cleanThreadsHandler function
struct sigaction sa_struct;
sa_struct.sa_handler = cleanThreadsHandler;
sa_struct.sa_flags = 0;
// except SIGINT all signals are blocked
sigfillset(&sa_struct.sa_mask);
sigdelset(&sa_struct.sa_mask, SIGINT);
if ((retVal = sigaction(SIGINT, &sa_struct, NULL)) == -1) {
fprintf(stderr, "[%s:%d] sigaction: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: sigaction with return value: %d.\n",
__FUNCTION__, __LINE__, retVal);
// prepare mutex
if ((retVal = pthread_mutex_init(&mutex_zigbee_coordinator, NULL)) != 0) {
fprintf(stderr, "[%s:%d] pthread_mutex_init: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
if ((retVal = pthread_mutex_init(&mutex_gprs, NULL)) != 0) {
fprintf(stderr, "[%s:%d] pthread_mutex_init: %s.\n", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
// create child threads
memset(p_dht11_resource_struct, '\0', sizeof(ARG_STRUCT));
p_dht11_resource_struct->rw_fd = *p_coordinator_fd;
DebugLog(
"[DEBUG-INFO %s:%d]: Pass to child thread dht11 read/write fd: %d.\n",
__FUNCTION__, __LINE__, p_dht11_resource_struct->rw_fd);
p_dht11_resource_struct->shm_id = *p_shm_id;
DebugLog(
"[DEBUG-INFO %s:%d]: Pass to child thread dht11 shared memory id: %d.\n",
__FUNCTION__, __LINE__, p_dht11_resource_struct->shm_id);
if ((retVal = pthread_create(&id_dht11, NULL, pthread_dht11,
p_dht11_resource_struct)) != 0) {
fprintf(stderr, "[%s:%d] pthread_create: %s", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog("[DEBUG-INFO %s:%d]: Create child thread pthread_dht11 with return "
"value: %d.\n",
__FUNCTION__, __LINE__, retVal);
memset(p_fan_resource_struct, '\0', sizeof(ARG_STRUCT));
p_fan_resource_struct->rw_fd = *p_coordinator_fd;
DebugLog(
"[DEBUG-INFO %s:%d]: Pass to child thread pthread_fan read/write fd: "
"%d.\n",
__FUNCTION__, __LINE__, p_fan_resource_struct->rw_fd);
p_fan_resource_struct->mq_id = *p_msg_id;
DebugLog(
"[DEBUG-INFO %s:%d]: Pass to child thread pthread_fan message queue id: "
"%d.\n",
__FUNCTION__, __LINE__, p_fan_resource_struct->mq_id);
if ((retVal = pthread_create(&id_fan, NULL, pthread_fan,
p_fan_resource_struct)) != 0) {
fprintf(stderr, "[%s:%d] pthread_create: %s", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog(
"[DEBUG-INFO %s:%d]: Create child thread pthread_fan with return value: "
"%d\n",
__FUNCTION__, __LINE__, retVal);
memset(p_gprs_resource_struct, '\0', sizeof(ARG_STRUCT));
p_gprs_resource_struct->rw_fd = *p_gprs_fd;
DebugLog("[DEBUG-INFO %s:%d]: Pass to child thread gprs read/write fd: %d.\n",
__FUNCTION__, __LINE__, p_gprs_resource_struct->rw_fd);
p_gprs_resource_struct->mq_id = *p_msg_id;
DebugLog(
"[DEBUG-INFO %s:%d]: Pass to child thread gprs message queue id: %d.\n",
__FUNCTION__, __LINE__, p_gprs_resource_struct->mq_id);
if ((retVal = pthread_create(&id_gprs, NULL, pthread_gprs,
p_gprs_resource_struct)) != 0) {
fprintf(stderr, "[%s:%d] pthread_create: %s", __FUNCTION__, __LINE__,
strerror(errno));
exit(-1);
}
DebugLog(
"[DEBUG-INFO %s:%d]: Create child thread pthread_gprs with return value: "
"%d.\n",
__FUNCTION__, __LINE__, retVal);
// wait for child thread return
pthread_join(id_dht11, NULL);
pthread_join(id_fan, NULL);
pthread_join(id_gprs, NULL);
// destory mutex
pthread_mutex_destroy(&mutex_zigbee_coordinator);
pthread_mutex_destroy(&mutex_gprs);
// remove IPC
shmctl(*p_shm_id, IPC_RMID, NULL);
msgctl(*p_msg_id, IPC_RMID, NULL);
// close file describer
close(*p_coordinator_fd);
close(*p_gprs_fd);
// free memory
free(p_coordinator_fd);
free(p_gprs_fd);
free(p_shm_key);
free(p_msg_key);
free(p_shm_id);
free(p_msg_id);
free(p_dht11_resource_struct);
free(p_fan_resource_struct);
free(p_gprs_resource_struct);
return 0;
}
static void cleanThreadsHandler(int signum) {
if (signum == SIGINT) {
should_exit = 1;
}
}
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