X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=schemaparser%2Fblock_allocator.cc;fp=schemaparser%2Fblock_allocator.cc;h=270efaf8496be245c8f75fab40550338dcdabc11;hb=783f6bfa93c3eed4787bded3c35016952b74b2e3;hp=0000000000000000000000000000000000000000;hpb=5b238b84dd6a6fb77a68f9b37906b465ab08a7fd;p=ric-app%2Fmc.git

diff --git a/schemaparser/block_allocator.cc b/schemaparser/block_allocator.cc
new file mode 100644
index 0000000..270efaf
--- /dev/null
+++ b/schemaparser/block_allocator.cc
@@ -0,0 +1,59 @@
+// Distributed under the MIT license. Copyright (c) 2010, Ivan Vashchaev
+
+
+
+#include <stdlib.h>
+#include <algorithm>
+#include "block_allocator.h"
+
+
+namespace mc_json{
+
+block_allocator::block_allocator(size_t blocksize): m_head(0), m_blocksize(blocksize)
+{
+}
+
+block_allocator::~block_allocator()
+{
+	while (m_head)
+	{
+		block *temp = m_head->next;
+		::free(m_head);
+		m_head = temp;
+	}
+}
+
+void block_allocator::swap(block_allocator &rhs)
+{
+	std::swap(m_blocksize, rhs.m_blocksize);
+	std::swap(m_head, rhs.m_head);
+}
+
+void *block_allocator::malloc(size_t size)
+{
+	if ((m_head && m_head->used + size > m_head->size) || !m_head)
+	{
+		// calc needed size for allocation
+		size_t alloc_size = std::max(sizeof(block) + size, m_blocksize);
+
+		// create new block
+		char *buffer = (char *)::malloc(alloc_size);
+		block *b = reinterpret_cast<block *>(buffer);
+		b->size = alloc_size;
+		b->used = sizeof(block);
+		b->buffer = buffer;
+		b->next = m_head;
+		m_head = b;
+	}
+
+	void *ptr = m_head->buffer + m_head->used;
+	m_head->used += size;
+	return ptr;
+}
+
+void block_allocator::free()
+{
+	block_allocator(0).swap(*this);
+}
+
+}