1 #ifndef CYGONCE_MEMALLOC_MFIXIMPL_HXX
2 #define CYGONCE_MEMALLOC_MFIXIMPL_HXX
4 //==========================================================================
8 // Memory pool with fixed block class declarations
10 //==========================================================================
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43 //==========================================================================
44 //#####DESCRIPTIONBEGIN####
47 // Contributors: jlarmour
49 // Purpose: Define Mfiximpl class interface
50 // Description: Inline class for constructing a fixed block allocator
51 // Usage: #include <cyg/memalloc/mfiximpl.hxx>
54 //####DESCRIPTIONEND####
56 //==========================================================================
58 #include <cyg/infra/cyg_type.h>
59 #include <cyg/memalloc/common.hxx> // Common memory allocator infra
61 class Cyg_Mempool_Fixed_Implementation {
63 // these constructors are explicitly disallowed
64 Cyg_Mempool_Fixed_Implementation() {};
65 // Cyg_Mempool_Fixed_Implementation( Cyg_Mempool_Fixed_Implementation &ref )
67 Cyg_Mempool_Fixed_Implementation &
68 operator=( Cyg_Mempool_Fixed_Implementation &ref )
81 // THIS is the public API of memory pools generally that can have the
82 // kernel oriented thread-safe package layer atop.
84 // The kernel package is a template whose type parameter is one of
85 // these. That is the reason there are superfluous parameters here and
86 // more genereralization than might be expected in a fixed block
89 // Constructor: gives the base and size of the arena in which memory is
90 // to be carved out, note that management structures are taken from the
91 // same arena. The alloc_unit may be any other param in general; it
92 // comes through from the outer constructor unchanged.
93 Cyg_Mempool_Fixed_Implementation(
96 CYG_ADDRWORD alloc_unit );
99 ~Cyg_Mempool_Fixed_Implementation();
101 // get some memory; size is ignored in a fixed block allocator
102 cyg_uint8 *try_alloc( cyg_int32 size );
104 // supposedly resize existing allocation. This is defined in the
105 // fixed block allocator purely for API consistency. It will return
106 // an error (false) for all values, except for the blocksize
107 // returns true on success
109 resize_alloc( cyg_uint8 *alloc_ptr, cyg_int32 newsize,
110 cyg_int32 *oldsize=NULL );
112 // free the memory back to the pool; size ignored here
113 cyg_bool free( cyg_uint8 *p, cyg_int32 size );
115 // Get memory pool status
116 // flags is a bitmask of requested fields to fill in. The flags are
117 // defined in common.hxx
118 void get_status( cyg_mempool_status_flag_t /* flags */,
119 Cyg_Mempool_Status & /* status */ );
123 #include <cyg/memalloc/mfiximpl.inl>
125 // -------------------------------------------------------------------------
126 #endif // ifndef CYGONCE_MEMALLOC_MFIXIMPL_HXX