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lang/c/msgpack: C++ binding: safer memory managent

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git-svn-id: file:///Users/frsyuki/project/msgpack-git/svn/x@68 5a5092ae-2292-43ba-b2d5-dcab9c1a2731
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frsyuki
2009-02-15 09:09:58 +00:00
parent 9923cf4daf
commit b790df530a
4 changed files with 102 additions and 24 deletions
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60
cpp/unpack.hpp
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@@ -20,6 +20,7 @@
#include "msgpack/object.hpp"
#include "msgpack/zone.hpp"
#include <memory>
#include <stdexcept>
#ifndef MSGPACK_UNPACKER_INITIAL_BUFFER_SIZE
@@ -40,7 +41,7 @@ struct unpack_error : public std::runtime_error {
class unpacker {
public:
unpacker(zone& z);
unpacker();
~unpacker();
public:
@@ -60,8 +61,52 @@ public:
/*! 5.1. if execute() returns true, take out the parsed object */
object data();
/*! 5.2. re-initialize unpacker with next zone */
void reset(zone& z);
/*! 5.2. the object is valid until the zone is deleted */
// Note that once release_zone() from unpacker, you must delete it
// otherwise the memrory will leak.
zone* release_zone();
/*! 5.3. after release_zone(), re-initialize unpacker */
void reset();
// Basic usage of the unpacker is as following:
//
// msgpack::unpacker pac;
//
// while( /* readable */ ) {
//
// // 1.
// pac.reserve(1024);
//
// // 2.
// ssize_t bytes =
// read(the_source, pac.buffer, pac.buffer_capacity());
//
// // error handling ...
//
// // 3.
// pac.buffer_consumed(bytes);
//
// // 4.
// while(pac.execute()) {
// // 5.1
// object o = pac.data();
//
// // 5.2
// std::auto_ptr<msgpack::zone> olife( pac.release_zone() );
//
// // boost::shared_ptr is also usable:
// // boost::shared_ptr<msgpack::zone> olife( pac.release_zone() );
//
// // 5.3
// pac.reset();
//
// // do some with the object with the old zone.
// do_something(o, olife);
// }
// }
//
public:
// These functions are usable when non-MessagePack message follows after
@@ -80,19 +125,20 @@ public:
void remove_nonparsed_buffer();
private:
struct context;
context* m_ctx;
char* m_buffer;
size_t m_used;
size_t m_free;
size_t m_off;
std::auto_ptr<zone> m_zone;
struct context;
context* m_ctx;
private:
void expand_buffer(size_t len);
private:
unpacker();
unpacker(const unpacker&);
public: