diff src/parallel_execution/stack.c @ 87:9e139a340bd1 parallel_execution

rename directory
author Shohei KOKUBO <e105744@ie.u-ryukyu.ac.jp>
date Tue, 19 Jan 2016 16:16:26 +0900
parents src/tmp/stack.c@e06e1a9e569e
children f57e9ffa7960
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/parallel_execution/stack.c	Tue Jan 19 16:16:26 2016 +0900
@@ -0,0 +1,68 @@
+#include <string.h>
+#include "stack.h"
+
+stack_ptr stack_init(size_t size, int max) {
+    stack_ptr stack_ptr;
+    
+    if ((stack_ptr = calloc(1, sizeof(stack))) == NULL)
+        return NULL;
+    
+    if ((stack_ptr->data = calloc(max, size)) == NULL) {
+        free(stack_ptr);
+        return NULL;
+    }
+
+    stack_ptr->size = size;
+    stack_ptr->max = max;
+    stack_ptr->num = 0;
+
+    return stack_ptr;
+}
+
+stack_ptr stack_realloc(stack_ptr stack_ptr, int max) {
+    if (stack_ptr == NULL)
+        return NULL;
+
+    if ((stack_ptr->data = realloc(stack_ptr->data, stack_ptr->size*max)) == NULL)
+        return NULL;
+
+    stack_ptr->max = max;
+
+    return stack_ptr;
+}
+
+void stack_free(stack_ptr stack_ptr) {
+    if (stack_ptr != NULL && stack_ptr->data != NULL) {
+        free(stack_ptr->data);
+        free(stack_ptr);
+    }
+}
+    
+int stack_push(stack_ptr stack_ptr, void* data) {
+    if (stack_ptr->max <= stack_ptr->num)
+        return -1;
+
+    memcpy((char*)stack_ptr->data+stack_ptr->num*stack_ptr->size,  data, stack_ptr->size);
+    stack_ptr->num++;
+
+    return 0;
+}
+
+int stack_pop(stack_ptr stack_ptr, void* data) {
+    if (stack_ptr->num == 0)
+        return -1;
+
+    stack_ptr->num--;
+
+    memcpy(data, (char*)stack_ptr->data+stack_ptr->num*stack_ptr->size, stack_ptr->size);
+    
+    return 0;
+}
+
+int isMax(const stack_ptr stack_ptr) {
+    return stack_ptr->max<=stack_ptr->num;
+}
+
+int isEmpty(const stack_ptr stack_ptr) {
+    return stack_ptr->num<=0;
+}