Fixed memory management for Matrix Free. Initialize Matrix with UNDEFINED flag as PHP does not work with NULL.

Author: henrique-borba

kernel/carray.c

@@ -35,6 +35,8 @@ void carray_init(int rows, int cols, MemoryPointer * ptr) {
     x.array2d = (float**)malloc(rows * sizeof(float*) + 64);
     for (i = 0; i < rows; ++i)
         x.array2d[i] = (float*)malloc(cols * sizeof(float));
+    x.array1d = UNINITIALIZED;
+    x.array0d = UNINITIALIZED;
     add_to_stack(ptr, x,(rows * cols * sizeof(float)) + 64);
 }
 
@@ -49,6 +51,8 @@ void carray_init(int rows, int cols, MemoryPointer * ptr) {
 void carray_init1d(int width, MemoryPointer * ptr) {
     CArray x;
     int j, i;
+    x.array0d = UNINITIALIZED;
+    x.array2d = UNINITIALIZED;
     x.array1d = (float*)malloc(width * sizeof(float) + 64);
     add_to_stack(ptr, x,(width * sizeof(float)) + 64);
 }
@@ -63,6 +67,8 @@ void carray_init1d(int width, MemoryPointer * ptr) {
 void carray_init0d(MemoryPointer * ptr) {
     CArray x;
     int j, i;
+    x.array1d = UNINITIALIZED;
+    x.array2d = UNINITIALIZED;
     x.array0d = (float*)malloc(sizeof(float) + 64);
     add_to_stack(ptr, x,sizeof(float) + 64);
 }

phpsci.c

@@ -296,15 +296,17 @@ static PHP_MSHUTDOWN_FUNCTION(phpsci)
 {
     int i;
     for(i = 0; i < PHPSCI_MAIN_MEM_STACK.size; i++) {
-        if(PHPSCI_MAIN_MEM_STACK.buffer[i].array1d != NULL) {
+        if(PHPSCI_MAIN_MEM_STACK.buffer[i].array0d != UNINITIALIZED) {
+            free(PHPSCI_MAIN_MEM_STACK.buffer[i].array0d);
+        }
+        if(PHPSCI_MAIN_MEM_STACK.buffer[i].array1d != UNINITIALIZED) {
             free(PHPSCI_MAIN_MEM_STACK.buffer[i].array1d);
         }
-        if(PHPSCI_MAIN_MEM_STACK.buffer[i].array2d != NULL) {
+        if(PHPSCI_MAIN_MEM_STACK.buffer[i].array2d != UNINITIALIZED) {
             free(PHPSCI_MAIN_MEM_STACK.buffer[i].array2d[0]);
             free(PHPSCI_MAIN_MEM_STACK.buffer[i].array2d);
         }
     }
-    free(PHPSCI_MAIN_MEM_STACK.buffer);
     UNREGISTER_INI_ENTRIES();
     return SUCCESS;
 }