monocoque initial commit

tests/setsimdata.c

@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "../src/monocoque/simulatorapi/simdata.h"
+#include "../src/monocoque/simulatorapi/test.h"
+
+#define DATA "Hello, World! From PID %d"
+
+int main(int argc, char* argv[])
+{
+    int res;
+    int fd;
+    int len;
+    pid_t pid;
+    void* addr;
+
+    pid = getpid();
+
+    // get shared memory file descriptor (NOT a file)
+    fd = shm_open(TEST_MEM_FILE_LOCATION, O_RDWR, S_IRUSR | S_IWUSR);
+    if (fd == -1)
+    {
+        perror("open");
+        return 10;
+    }
+
+    // extend shared memory object as by default it's initialized with size 0
+    //res = ftruncate(fd, STORAGE_SIZE);
+    SimData* data = malloc(sizeof(SimData));
+    data->velocity=1;
+    data->gear=4;
+    data->maxrpm=6500;
+    data->rpms=1000;
+    //SimData.pulses=398273;
+
+    res = ftruncate(fd, sizeof(SimData));
+    if (res == -1)
+    {
+        //perror("ftruncate");
+        //return 20;
+    }
+
+    data->velocity=atoi(argv[1]);
+    data->rpms=atoi(argv[2]);
+    data->gear=atoi(argv[3]);
+    //SimData.pulses=39993;
+    // map .shared memory to process address space
+    addr = mmap(NULL, sizeof(SimData), PROT_WRITE, MAP_SHARED, fd, 0);
+    if (addr == MAP_FAILED)
+    {
+        perror("mmap");
+        return 30;
+    }
+
+    memcpy(addr, data, sizeof(SimData));
+
+    return 0;
+}