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145 lines
2.8 KiB
C
145 lines
2.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <semaphore.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <fcntl.h>
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#include "acquisitionManager.h"
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#include "msg.h"
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#include "iSensor.h"
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#include "mySoftware.h"
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#include "iAcquisitionManager.h"
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#include "debug.h"
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//producer count storage
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volatile unsigned int produceCount = 0;
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pthread_t producers[4];
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static void *produce(void *ithread);
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/**
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* Semaphores and Mutex
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*/
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pthread_mutex_t m1 = PTHREAD_MUTEX_INITIALIZER;
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// Ring buffer
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MSG_BLOCK buffer[100];
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unsigned int buf_head = 0;
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unsigned int buf_tail = 0;
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/*
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* Creates the synchronization elements.
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* @return ERROR_SUCCESS if the init is ok, ERROR_INIT otherwise
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*/
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static unsigned int createSynchronizationObjects(void);
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/*
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* Increments the produce count.
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*/
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static void incrementProducerCount(void);
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static unsigned int createSynchronizationObjects(void)
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{
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//TODO
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printf("[acquisitionManager]Semaphore created\n");
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return ERROR_SUCCESS;
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}
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static void incrementProducerCount(void)
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{
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pthread_mutex_lock(&m1);
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produceCount++;
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pthread_mutex_unlock(&m1);
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}
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unsigned int getProducerCount(void)
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{
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unsigned int p = 0;
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pthread_mutex_lock(&m1);
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p = produceCount;
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pthread_mutex_unlock(&m1);
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return p;
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}
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void getMessage(volatile MSG_BLOCK* mBlock) {
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volatile MSG_BLOCK msg;
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char done = 0;
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// Voir TD Vincent David
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// Là c'est une version de personne frustrée ne correspondant pas au TD
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while (!done) {
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pthread_mutex_lock(&m1);
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if (buf_tail > buf_head) {
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msg = buffer[buf_tail];
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buf_tail++;
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done = 1;
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}
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pthread_mutex_unlock(&m1);
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}
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*mBlock = msg;
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}
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unsigned int acquisitionManagerInit(void)
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{
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unsigned int i;
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printf("[acquisitionManager]Synchronization initialization in progress...\n");
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fflush( stdout );
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if (createSynchronizationObjects() == ERROR_INIT)
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return ERROR_INIT;
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printf("[acquisitionManager]Synchronization initialization done.\n");
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for (i = 0; i < PRODUCER_COUNT; i++)
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{
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pthread_create(&producers[i], NULL, &produce, &i);
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}
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return ERROR_SUCCESS;
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}
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void acquisitionManagerJoin(void)
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{
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unsigned int i;
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for (i = 0; i < PRODUCER_COUNT; i++)
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{
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pthread_join(producers[i], NULL);
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}
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//TODO
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printf("[acquisitionManager]Semaphore cleaned\n");
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}
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void *produce(void *ithread)
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{
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D(printf("[acquisitionManager]Producer created with id %d\n", gettid()));
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unsigned int i = 0;
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MSG_BLOCK msg;
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char done = 0;
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while (i < PRODUCER_LOOP_LIMIT)
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{
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i++;
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sleep(PRODUCER_SLEEP_TIME+(rand() % 5));
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// Acquire input
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getInput(*(int *)ithread, &msg);
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// Store in ring buffer
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pthread_mutex_lock(&m1);
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while (!done) {
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pthread_mutex_lock(&m1);
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if (buf_head < 100) {
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buffer[buf_head] = msg;
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buf_head++;
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done = 1;
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}
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pthread_mutex_unlock(&m1);
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}
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pthread_mutex_unlock(&m1);
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}
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printf("[acquisitionManager] %ld termination\n", gettid());
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pthread_exit(NULL);
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}
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