Checkpointing.

src/OpenTask.cpp

@@ -0,0 +1,47 @@
+
+
+#include "OpenTask.h"
+#include <sys/stat.h>
+
+using namespace std;
+
+namespace storagemanager
+{
+
+OpenTask::OpenTask(int sock, uint len) : PosixTask(sock, len)
+{
+}
+
+void OpenTask::run()
+{
+    /*
+        get the parameters
+        call IOManager to do the work
+        return the result
+    */
+    bool success;
+    uint8_t *buf = alloca(max(getLength(), sizeof(struct stat) + SM_HEADER_LEN));
+    
+    success = read(&buf, getLength());
+    if (!success)
+    {
+        handleError("OpenTask read", errno);
+        return;
+    }
+    
+    uint32_t flen = *((uint32_t *) &buf[0]);
+    string filename((char *) &buf[4], flen);   // might want to require filenames to be NULL-terminated for efficiency
+    int openmode = *((int *) &buf[4+flen]);
+    
+    // IOC->open(filename, openmode, &buf[SM_HEADER_LEN])
+    
+    // stand-in dummy response
+    uint32_t *buf32 = (uint32_t *) &buf[0];
+    buf32[0] = SM_MSG_START;
+    buf32[1] = sizeof(struct stat);
+    success = write(buf, sizeof(struct stat) + SM_HEADER_LEN);
+    if (!success)
+        handleError("OpenTask write", errno);
+}
+
+}