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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [services/] [memalloc/] [common/] [v2_0/] [src/] [sepmeta.cxx] - Rev 600
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//========================================================================== // // sepmeta.cxx // // Variable block memory pool with separated metadata class declarations // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): jlarmour // Contributors: // Date: 2001-06-28 // Description: // Usage: #include <cyg/memalloc/sepmeta.hxx> // // //####DESCRIPTIONEND#### // //========================================================================== // CONFIGURATION #include <pkgconf/memalloc.h> #include <pkgconf/system.h> #ifdef CYGPKG_KERNEL # include <pkgconf/kernel.h> #endif // INCLUDES #include <cyg/infra/cyg_type.h> // types #include <cyg/infra/cyg_ass.h> // assertion macros #include <cyg/infra/cyg_trac.h> // tracing macros #ifdef CYGFUN_KERNEL_THREADS_TIMER # include <cyg/kernel/ktypes.h> // cyg_tick_count #endif #ifdef CYGSEM_MEMALLOC_ALLOCATOR_SEPMETA_THREADAWARE # include <cyg/memalloc/mempolt2.hxx> // kernel safe mempool template #endif #include <cyg/memalloc/sepmeta.hxx> #include <cyg/memalloc/sepmetaimpl.hxx>// implementation of this mem pool #include <cyg/memalloc/common.hxx> // Common memory allocator infra // FUNCTIONS // ------------------------------------------------------------------------- // debugging/assert function #ifdef CYGDBG_USE_ASSERTS cyg_bool Cyg_Mempool_Sepmeta::check_this(cyg_assert_class_zeal zeal) const { CYG_REPORT_FUNCTION(); // check that we have a non-NULL pointer first if( this == NULL ) return false; #ifdef CYGSEM_MEMALLOC_ALLOCATOR_SEPMETA_THREADAWARE return mypool.check_this( zeal ); #else return true; #endif } #endif // ------------------------------------------------------------------------- // Constructor: gives the base and size of the arena in which memory is // to be carved out Cyg_Mempool_Sepmeta::Cyg_Mempool_Sepmeta( cyg_uint8 *base, cyg_int32 size, cyg_int32 alignment, cyg_uint8 *metabase, cyg_uint32 metasize) : args(alignment, metabase, metasize), mypool( base, size, (CYG_ADDRWORD)&args ) { } // Destructor Cyg_Mempool_Sepmeta::~Cyg_Mempool_Sepmeta() { } // ------------------------------------------------------------------------- // get some memory; wait if none available #ifdef CYGSEM_MEMALLOC_ALLOCATOR_SEPMETA_THREADAWARE cyg_uint8 * Cyg_Mempool_Sepmeta::alloc(cyg_int32 size) { return mypool.alloc( size ); } # ifdef CYGFUN_KERNEL_THREADS_TIMER // get some memory with a timeout cyg_uint8 * Cyg_Mempool_Sepmeta::alloc(cyg_int32 size, cyg_tick_count delay_timeout) { return mypool.alloc( size , delay_timeout ); } # endif #endif // get some memory, return NULL if none available cyg_uint8 * Cyg_Mempool_Sepmeta::try_alloc(cyg_int32 size) { return mypool.try_alloc( size ); } // resize existing allocation, if oldsize is non-NULL, previous // allocation size is placed into it. If previous size not available, // it is set to 0. NB previous allocation size may have been rounded up. // Occasionally the allocation can be adjusted *backwards* as well as, // or instead of forwards, therefore the address of the resized // allocation is returned, or NULL if no resizing was possible. // Note that this differs from ::realloc() in that no attempt is // made to call malloc() if resizing is not possible - that is left // to higher layers. The data is copied from old to new though. // The effects of alloc_ptr==NULL or newsize==0 are undefined cyg_uint8 * Cyg_Mempool_Sepmeta::resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize, cyg_int32 *oldsize ) { return mypool.resize_alloc( alloc_ptr, newsize, oldsize ); } // free the memory back to the pool cyg_bool Cyg_Mempool_Sepmeta::free( cyg_uint8 *p, cyg_int32 size ) { return mypool.free( p, size ); } // Get memory pool status void Cyg_Mempool_Sepmeta::get_status( cyg_mempool_status_flag_t flags, Cyg_Mempool_Status &status ) { // set to 0 - if there's anything really waiting, it will be set to // 1 later status.waiting = 0; return mypool.get_status( flags, status ); } // ------------------------------------------------------------------------- // End of sepmeta.cxx
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