feat: add stack

stack/mystack.c

@@ -0,0 +1,88 @@
+#include "mystack.h"
+
+#include <stdlib.h>
+#include <threads.h>
+
+stack_s *stack_new(size_t initial_capacity, size_t element_size) {
+	if (element_size == 0) {
+		return NULL;
+	}
+
+	stack_s *stack = (stack_s *)malloc(sizeof(stack_s));
+	if (stack == NULL) {
+		return NULL;
+	}
+
+	if (mtx_init(&stack->lock, mtx_recursive) != thrd_success) {
+		free(stack);
+		return NULL;
+	}
+
+	/* Allocate the vec data */
+	stack->data = vec_new(initial_capacity, element_size);
+	if (stack->data == NULL) {
+		free(stack);
+		return NULL;
+	}
+
+	stack->elem_size = element_size;
+
+	return stack;
+}
+
+void *stack_pop(stack_s *stack) {
+	if (stack == NULL) {
+		return NULL;
+	}
+
+	if (mtx_lock(&stack->lock) != thrd_success) {
+		return NULL;
+	}
+
+	void *elem = vec_pop(stack->data);
+
+	mtx_unlock(&stack->lock);
+
+	return elem;
+}
+
+int stack_push(stack_s *stack, void *elem) {
+	if (stack == NULL || elem == NULL) {
+		return -1;
+	}
+
+	if (mtx_lock(&stack->lock) != thrd_success) {
+		return -1;
+	}
+
+	int ret = vec_push(stack->data, elem);
+
+	mtx_unlock(&stack->lock);
+
+	return ret;
+}
+
+void *stack_top(stack_s *stack) {
+	if (stack == NULL) {
+		return NULL;
+	}
+
+	if (mtx_lock(&stack->lock) != thrd_success) {
+		return NULL;
+	}
+
+	void *elem = vec_get(stack->data, stack->data->size - 1);
+
+	mtx_unlock(&stack->lock);
+
+	return elem;
+}
+
+void stack_free(stack_s *stack) {
+	if (stack == NULL) {
+		return;
+	}
+
+	vec_free(stack->data);
+	free(stack);
+}