diff packages/kernel/current/src/mem/memfixed.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
parents
children 443894e2e912
line wrap: on
line diff
new file mode 100644
--- /dev/null
+++ b/packages/kernel/current/src/mem/memfixed.cxx
@@ -0,0 +1,169 @@
+//==========================================================================
+//
+//	memfixed.cxx
+//
+//	Memory pool with fixed block class declarations
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s): 	hmt
+// Contributors:	hmt
+// Date:	1998-03-23
+// Purpose:	Define Memfixed class interface
+// Description:	Inline class for constructing a fixed block allocator
+// Usage:	#include <cyg/kernel/memfixed.hxx>
+//		
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <pkgconf/kernel.h>
+
+#include <cyg/kernel/ktypes.h>         // base kernel types
+#include <cyg/infra/cyg_trac.h>        // tracing macros
+#include <cyg/infra/cyg_ass.h>         // assertion macros
+#include <cyg/kernel/instrmnt.h>       // instrumentation
+
+#include <cyg/kernel/memfixed.hxx>
+
+// implementation that we want to make concrete
+#ifdef CYGIMP_MEM_USE_MEMPOOLT_PLAIN
+#include <cyg/kernel/mempoolt.inl>     // kernel safe mempool template
+#else
+// tell it to optimize for the fixed block one-to-one case
+#define CYGIMP_MEM_T_ONEFREE_TO_ONEALLOC
+#include <cyg/kernel/mempolt2.inl>     // kernel safe mempool template
+#endif
+
+#include <cyg/kernel/mfiximpl.inl>     // implementation of a fixed mem pool
+
+// -------------------------------------------------------------------------
+// debugging/assert function
+
+#ifdef CYGDBG_USE_ASSERTS
+cyg_bool
+Cyg_Mempool_Fixed::check_this(cyg_assert_class_zeal zeal)
+{
+    CYG_REPORT_FUNCTION();
+    // check that we have a non-NULL pointer first
+    if( this == NULL ) return false;
+    return mypool.check_this( zeal );
+}
+#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
+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
+
+// 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 );
+}
+
+// is anyone waiting for memory?
+cyg_bool
+Cyg_Mempool_Fixed::waiting()
+{
+    return mypool.waiting();
+}
+
+// read the fixed allocation size
+cyg_int32 
+Cyg_Mempool_Fixed::get_blocksize()
+{
+    return mypool.get_blocksize();
+}
+
+// these two are obvious and generic
+cyg_int32 
+Cyg_Mempool_Fixed::get_totalmem() {
+    return mypool.get_totalmem();
+}
+cyg_int32 
+Cyg_Mempool_Fixed::get_freemem() {
+    return mypool.get_freemem();
+}
+
+// get information about the construction parameters for external
+// freeing after the destruction of the holding object
+void 
+Cyg_Mempool_Fixed::get_arena(
+    cyg_uint8 * &base, cyg_int32 &size, CYG_ADDRWORD &alloc  )
+{
+    mypool.get_arena( base, size, alloc );  
+}
+
+// Return the size of the memory allocation (previously returned 
+// by alloc() or try_alloc() ) at ptr. Returns -1 if not found
+cyg_int32
+Cyg_Mempool_Fixed::get_allocation_size( cyg_uint8 *ptr )
+{
+    // can only be one size for the fixed block allocator
+    return mypool.get_blocksize();
+}
+// -------------------------------------------------------------------------
+
+// End of memfixed.cxx