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Diffstat (limited to 'pjlib/include/pj++/pool.hpp')
| -rw-r--r-- | pjlib/include/pj++/pool.hpp | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/pjlib/include/pj++/pool.hpp b/pjlib/include/pj++/pool.hpp new file mode 100644 index 0000000..8800ddb --- /dev/null +++ b/pjlib/include/pj++/pool.hpp @@ -0,0 +1,279 @@ +/* $Id: pool.hpp 2394 2008-12-23 17:27:53Z bennylp $ */ +/* + * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com) + * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#ifndef __PJPP_POOL_HPP__ +#define __PJPP_POOL_HPP__ + +#include <pj/pool.h> + +class Pj_Pool; +class Pj_Caching_Pool; + +// +// Base class for all Pjlib objects +// +class Pj_Object +{ +public: + void *operator new(unsigned int class_size, Pj_Pool *pool); + void *operator new(unsigned int class_size, Pj_Pool &pool); + + void operator delete(void*) + { + } + + void operator delete(void*, Pj_Pool*) + { + } + + void operator delete(void*, Pj_Pool&) + { + } + + // + // Inline implementations at the end of this file. + // + +private: + // Can not use normal new operator; must use pool. + // e.g.: + // obj = new(pool) Pj_The_Object(pool, ...); + // + void *operator new(unsigned int) + {} +}; + + +// +// Pool. +// +class Pj_Pool : public Pj_Object +{ +public: + // + // Default constructor, initializes internal pool to NULL. + // Application must call attach() some time later. + // + Pj_Pool() + : p_(NULL) + { + } + + // + // Create pool. + // + Pj_Pool(Pj_Caching_Pool &caching_pool, + pj_size_t initial_size, + pj_size_t increment_size, + const char *name = NULL, + pj_pool_callback *callback = NULL); + + // + // Construct from existing pool. + // + explicit Pj_Pool(pj_pool_t *pool) + : p_(pool) + { + } + + // + // Attach existing pool. + // + void attach(pj_pool_t *pool) + { + p_ = pool; + } + + // + // Destructor. + // + // Release pool back to factory. Remember: if you delete pool, then + // make sure that all objects that have been allocated from this pool + // have been properly destroyed. + // + // This is where C++ is trickier than plain C!! + // + ~Pj_Pool() + { + if (p_) + pj_pool_release(p_); + } + + // + // Get name. + // + const char *getobjname() const + { + return pj_pool_getobjname(p_); + } + + // + // You can cast Pj_Pool to pj_pool_t* + // + operator pj_pool_t*() + { + return p_; + } + + // + // Get pjlib compatible pool object. + // + pj_pool_t *pool_() + { + return p_; + } + + // + // Get pjlib compatible pool object. + // + const pj_pool_t *pool_() const + { + return p_; + } + + // + // Get pjlib compatible pool object. + // + pj_pool_t *pj_pool_t_() + { + return p_; + } + + // + // Reset pool. + // + void reset() + { + pj_pool_reset(p_); + } + + // + // Get current capacity. + // + pj_size_t get_capacity() + { + pj_pool_get_capacity(p_); + } + + // + // Get current total bytes allocated from the pool. + // + pj_size_t get_used_size() + { + pj_pool_get_used_size(p_); + } + + // + // Allocate. + // + void *alloc(pj_size_t size) + { + return pj_pool_alloc(p_, size); + } + + // + // Allocate elements and zero fill the memory. + // + void *calloc(pj_size_t count, pj_size_t elem) + { + return pj_pool_calloc(p_, count, elem); + } + + // + // Allocate and zero fill memory. + // + void *zalloc(pj_size_t size) + { + return pj_pool_zalloc(p_, size); + } + +private: + pj_pool_t *p_; +}; + + +// +// Caching pool. +// +class Pj_Caching_Pool +{ +public: + // + // Construct caching pool. + // + Pj_Caching_Pool( pj_size_t cache_capacity = 0, + const pj_pool_factory_policy *pol=&pj_pool_factory_default_policy) + { + pj_caching_pool_init(&cp_, pol, cache_capacity); + } + + // + // Destroy caching pool. + // + ~Pj_Caching_Pool() + { + pj_caching_pool_destroy(&cp_); + } + + // + // Create pool. + // + pj_pool_t *create_pool( pj_size_t initial_size, + pj_size_t increment_size, + const char *name = NULL, + pj_pool_callback *callback = NULL) + { + return (pj_pool_t*)(*cp_.factory.create_pool)(&cp_.factory, name, + initial_size, + increment_size, + callback); + } + +private: + pj_caching_pool cp_; +}; + +// +// Inlines for Pj_Object +// +inline void *Pj_Object::operator new(unsigned int class_size, Pj_Pool *pool) +{ + return pool->alloc(class_size); +} +inline void *Pj_Object::operator new(unsigned int class_size, Pj_Pool &pool) +{ + return pool.alloc(class_size); +} + +// +// Inlines for Pj_Pool +// +inline Pj_Pool::Pj_Pool( Pj_Caching_Pool &caching_pool, + pj_size_t initial_size, + pj_size_t increment_size, + const char *name, + pj_pool_callback *callback) +{ + p_ = caching_pool.create_pool(initial_size, increment_size, name, + callback); +} + + +#endif /* __PJPP_POOL_HPP__ */ + |