New directory for testing application code

src/apps/eric/Makefile

@@ -0,0 +1,5 @@
+
+test: test.c
+	gcc -g -O2 -I ../../.. test.c -o test ../../../src/lladd/liblladd.a ../../../src/libdfa/librw.a -lc -lpthread -lm -lcheck
+
+

src/apps/eric/test.c

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+#include <stdio.h>
+#include <assert.h>
+#include <lladd/transactional.h>
+
+/*
+  Basic first program
+
+  Transactionally stores one integer, which is the version number of the store.
+  New store gets version 1.  Each rerun increments the version number.
+  If you delete logfile.txt and storefile.txt, it recreates them at version 1.
+*/
+
+int main(const int argc, const char **argv) {
+  int version = 1;
+
+  Tinit();
+  printf("Initialized\n");
+
+  // create/load the store
+  recordid rootEntry;
+
+  int xid = Tbegin();
+  if (TrecordType(xid, ROOT_RECORD) == UNINITIALIZED_RECORD) {
+    // new store, must create empty page
+    printf("Creating new store\n");
+    rootEntry = Talloc(xid, sizeof(int));
+    
+    assert(ROOT_RECORD.page == rootEntry.page);
+    assert(ROOT_RECORD.slot == rootEntry.slot);
+
+    Tset(xid, rootEntry, &version);
+    Tcommit(xid);
+  } else {
+    // store is valid
+    printf("Reusing existing store\n");
+    rootEntry = ROOT_RECORD;
+    rootEntry.size = sizeof(int);
+
+    Tread(xid, rootEntry, &version);
+    version++;
+    printf("read valid\n");
+    Tset(xid, rootEntry, &version);
+    Tcommit(xid);
+  }
+  printf("Version %d\n", version);
+
+  // wrap up
+
+  Tdeinit();
+  return 0;
+}