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#ifndef CYGONCE_KERNEL_MEMPOOLT_HXX
#define CYGONCE_KERNEL_MEMPOOLT_HXX
//==========================================================================
//
// mempoolt.hxx
//
// Mempoolt (Memory pool template) class declarations
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos 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 or (at your option) any later
// version.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): hmt
// Contributors: hmt
// Date: 1998-02-10
// Purpose: Define Mempoolt class interface
// Description: The class defined here provides the APIs for thread-safe,
// kernel-savvy memory managers; make a class with the
// underlying allocator as the template parameter.
// Usage: #include <cyg/kernel/mempoolt.hxx>
//
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include <cyg/kernel/ktypes.h>
#include <cyg/infra/cyg_ass.h> // assertion macros
#include <cyg/kernel/thread.hxx>
template <class T>
class Cyg_Mempoolt
{
private:
T pool; // underlying memory manager
Cyg_ThreadQueue queue; // queue of waiting threads
public:
CYGDBG_DEFINE_CHECK_THIS
Cyg_Mempoolt(
cyg_uint8 *base,
cyg_int32 size,
CYG_ADDRWORD arg_thru ); // Constructor
~Cyg_Mempoolt(); // Destructor
// get some memory; wait if none available; return NULL if failed
// due to interrupt
cyg_uint8 *alloc( cyg_int32 size );
#ifdef CYGFUN_KERNEL_THREADS_TIMER
// get some memory with a timeout; return NULL if failed
// due to interrupt or timeout
cyg_uint8 *alloc( cyg_int32 size, cyg_tick_count abs_timeout );
#endif
// get some memory, return NULL if none available
cyg_uint8 *try_alloc( cyg_int32 size );
// free the memory back to the pool
cyg_bool free( cyg_uint8 *p, cyg_int32 size );
// if applicable: return -1 if not fixed size
cyg_int32 get_blocksize();
// is anyone waiting for memory?
cyg_bool waiting() { return ! queue.empty(); }
// these two are obvious and generic
cyg_int32 get_totalmem();
cyg_int32 get_freemem();
// get information about the construction parameters for external
// freeing after the destruction of the holding object.
void get_arena(
cyg_uint8 * &base,
cyg_int32 &size,
CYG_ADDRWORD &arg_thru );
// Return the size of the memory allocation (previously returned
// by alloc() or try_alloc() ) at ptr. Returns -1 if not found
cyg_int32
get_allocation_size( cyg_uint8 * /* ptr */ );
};
// -------------------------------------------------------------------------
#endif // ifndef CYGONCE_KERNEL_MEMPOOLT_HXX
// EOF mempoolt.hxx
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