1 #ifndef CYGONCE_KERNEL_MEMPOOLT_HXX
2 #define CYGONCE_KERNEL_MEMPOOLT_HXX
4 //==========================================================================
8 // Mempoolt (Memory pool template) class declarations
10 //==========================================================================
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43 //==========================================================================
44 //#####DESCRIPTIONBEGIN####
49 // Purpose: Define Mempoolt class interface
51 // Description: The class defined here provides the APIs for thread-safe,
52 // kernel-savvy memory managers; make a class with the
53 // underlying allocator as the template parameter.
54 // Usage: #include <cyg/kernel/mempoolt.hxx>
57 //####DESCRIPTIONEND####
59 //==========================================================================
61 #include <cyg/kernel/ktypes.h>
62 #include <cyg/infra/cyg_ass.h> // assertion macros
63 #include <cyg/kernel/thread.hxx>
69 T pool; // underlying memory manager
70 Cyg_ThreadQueue queue; // queue of waiting threads
74 CYGDBG_DEFINE_CHECK_THIS
79 CYG_ADDRWORD arg_thru ); // Constructor
80 ~Cyg_Mempoolt(); // Destructor
82 // get some memory; wait if none available; return NULL if failed
84 cyg_uint8 *alloc( cyg_int32 size );
86 #ifdef CYGFUN_KERNEL_THREADS_TIMER
87 // get some memory with a timeout; return NULL if failed
88 // due to interrupt or timeout
89 cyg_uint8 *alloc( cyg_int32 size, cyg_tick_count abs_timeout );
92 // get some memory, return NULL if none available
93 cyg_uint8 *try_alloc( cyg_int32 size );
95 // free the memory back to the pool
96 cyg_bool free( cyg_uint8 *p, cyg_int32 size );
98 // if applicable: return -1 if not fixed size
99 cyg_int32 get_blocksize();
101 // is anyone waiting for memory?
102 cyg_bool waiting() { return ! queue.empty(); }
104 // these two are obvious and generic
105 cyg_int32 get_totalmem();
106 cyg_int32 get_freemem();
108 // get information about the construction parameters for external
109 // freeing after the destruction of the holding object.
113 CYG_ADDRWORD &arg_thru );
115 // Return the size of the memory allocation (previously returned
116 // by alloc() or try_alloc() ) at ptr. Returns -1 if not found
118 get_allocation_size( cyg_uint8 * /* ptr */ );
121 // -------------------------------------------------------------------------
122 #endif // ifndef CYGONCE_KERNEL_MEMPOOLT_HXX