URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [services/] [memalloc/] [common/] [v2_0/] [src/] [memfixed.cxx] - Rev 600
Go to most recent revision | Compare with Previous | Blame | View Log
//========================================================================== // // memfixed.cxx // // Memory pool with fixed block 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): hmt // Contributors: jlarmour // Date: 2000-06-16 // Purpose: Define Memfixed class interface // Description: Inline class for constructing a fixed block allocator // Usage: #include <cyg/memalloc/memfixed.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_FIXED_THREADAWARE // tell it to optimize for the fixed block one-to-one case # define CYGIMP_MEM_T_ONEFREE_TO_ONEALLOC # include <cyg/memalloc/mempolt2.hxx> // kernel safe mempool template #endif #include <cyg/memalloc/memfixed.hxx> #include <cyg/memalloc/mfiximpl.hxx> // implementation of a fixed mem pool #include <cyg/memalloc/common.hxx> // Common memory allocator infra // ------------------------------------------------------------------------- // debugging/assert function #ifdef CYGDBG_USE_ASSERTS cyg_bool Cyg_Mempool_Fixed::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_FIXED_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, note that management structures are taken from the // same arena. Alloc_unit is the blocksize allocated. Cyg_Mempool_Fixed::Cyg_Mempool_Fixed( cyg_uint8 *base, cyg_int32 size, CYG_ADDRWORD alloc_unit ) : mypool( base, size, alloc_unit ) { } // Destructor Cyg_Mempool_Fixed::~Cyg_Mempool_Fixed() { } // ------------------------------------------------------------------------- // get some memory; wait if none available #ifdef CYGSEM_MEMALLOC_ALLOCATOR_FIXED_THREADAWARE cyg_uint8 * Cyg_Mempool_Fixed::alloc() { return mypool.alloc( 0 ); } # ifdef CYGFUN_KERNEL_THREADS_TIMER // get some memory with a timeout cyg_uint8 * Cyg_Mempool_Fixed::alloc(cyg_tick_count delay_timeout ) { return mypool.alloc( 0, delay_timeout ); } # endif #endif // get some memory, return NULL if none available cyg_uint8 * Cyg_Mempool_Fixed::try_alloc() { return mypool.try_alloc( 0 ); } // free the memory back to the pool cyg_bool Cyg_Mempool_Fixed::free( cyg_uint8 *p ) { return mypool.free( p, 0 ); } // supposedly resize existing allocation. This is defined in the // fixed block allocator purely for API consistency. It will return // an error (false) for all values, except for the blocksize // returns true on success cyg_uint8 * Cyg_Mempool_Fixed::resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize, cyg_int32 *oldsize ) { return mypool.resize_alloc( alloc_ptr, newsize, oldsize ); } // Get memory pool status void Cyg_Mempool_Fixed::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 memfixed.cxx
Go to most recent revision | Compare with Previous | Blame | View Log