some fixes ig

src/client/modules/shm/c_shm.c

@@ -7,6 +7,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <sys/time.h>
 
 SharedData *shared_data;
 int shm_fd;
@@ -15,7 +16,7 @@ int c_shm_init() {
     printf("Client connecting to server...\n");
     
     /* open shm segment  */
-    shm_fd = shm_open(SHM_NAME, O_RDWR, 0666);
+    shm_fd = shm_open(SHM_NAME, O_RDWR, 0664);
     if (shm_fd < 0) {
         perror("shm_open");
         printf("[ERROR] Make sure that a shared memory server is up and running!\n");
@@ -43,8 +44,9 @@ void c_shm_send(int shm_fd, const char* message) {
     
     /* message is ready */
     shared_data->ready = 1;
+    gettimeofday(&shared_data->start, NULL); 
     printf("Sent: %s\n", message);
-    
+
     /* Wait for response */
     while (shared_data->ready == 1) {
         sleep(1);

src/server/modules/shm/s_shm.c

@@ -7,16 +7,19 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <sys/time.h>
 
 SharedData *shared_data;
 int shm_fd;
 
+
+
 int s_shm_init() {
     /* remove seg if it already is there */
     shm_unlink(SHM_NAME);
     
     /* create a shm segment */
-    shm_fd = shm_open(SHM_NAME, O_CREAT | O_RDWR, 0666);
+    shm_fd = shm_open(SHM_NAME, O_CREAT | O_RDWR, 0664);
     if (shm_fd < 0) {
         perror("shm_open");
         exit(1);
@@ -49,13 +52,22 @@ int s_shm_init() {
 
 void s_shm_accept(int shm_fd) {
     /* wait for clinet to set flag */
+  
     while (shared_data->ready == 0) {
         sleep(1);
     }
     
+    
+
     printf("Client connected\n");
     printf("Received: %s\n", shared_data->message);
+
+    struct timeval end;
+    gettimeofday(&end, NULL);
+
+    long elapsed = (end.tv_sec - shared_data->start.tv_sec) * 1000000 + (end.tv_usec - shared_data->start.tv_usec);
     
+    printf("Read time: %ld microseconds\n", elapsed);
     /* respond */
     memset(shared_data->message, 0, BUFFER_SIZE);
     strncpy(shared_data->message, "Message received!", BUFFER_SIZE - 1);

src/shared/shared.h

@@ -1,7 +1,8 @@
 #ifndef PROTOCOLS_H
 #define PROTOCOLS_H
+#include <sys/time.h>
 
-/*buffer size is for any icp same (why? -> bcs i decided it to be so)*/
+/*buffer size */
 #define BUFFER_SIZE 256
 
 /*defs for unix socket example*/
@@ -13,12 +14,12 @@
 #define FIFO_CLIENT_TO_SERVER "/tmp/fifo_client_to_server"
 
 /*defs for shared mem*/
-#define SHM_NAME "/posix_shm_example"
+#define SHM_NAME "/shmem_lab"
  
 typedef struct {
-    char message[BUFFER_SIZE];
+    char message[65535];
     int ready;
+    struct timeval start;
 } SharedData;
 
-
 #endif