1 #ifndef CYGONCE_KERNEL_MBOX_HXX
2 #define CYGONCE_KERNEL_MBOX_HXX
4 //==========================================================================
8 // Plain (void *) Mbox (Message Box/Mailbox) class declarations
10 //==========================================================================
11 //####ECOSGPLCOPYRIGHTBEGIN####
12 // -------------------------------------------
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41 // -------------------------------------------
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43 //==========================================================================
44 //#####DESCRIPTIONBEGIN####
49 // Purpose: Define Mbox class interfaces
50 // Description: The classes defined here provide the APIs for mboxes.
51 // Usage: #include <cyg/kernel/mbox.hxx>
54 //####DESCRIPTIONEND####
56 //==========================================================================
58 #include <cyg/kernel/ktypes.h>
59 #include <cyg/infra/cyg_ass.h> // assertion macros
60 #include <cyg/kernel/thread.hxx>
62 #ifdef CYGIMP_MBOX_USE_MBOXT_PLAIN
63 #include <cyg/kernel/mboxt.hxx>
65 #include <cyg/kernel/mboxt2.hxx>
68 // -------------------------------------------------------------------------
69 // Message/Mail Box. This class implements a queue of void * items using
70 // the Cyg_Mbox<Type, QSize> template class.
72 #ifndef CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE
73 // default is 10 elements
74 #define CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE (10)
77 // Cyg_Mbox has a fixed size array of (void *)s; one size fits all.
78 // Because of this, we can simplify the API by returning a NULL for
79 // "failed" conditions. Ergo a NULL message is illegal. BFD.
84 #ifdef CYGIMP_MBOX_USE_MBOXT_PLAIN
85 Cyg_Mboxt<void *, CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE> m;
87 Cyg_Mboxt2<void *, CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE> m;
92 CYGDBG_DEFINE_CHECK_THIS
94 Cyg_Mbox(); // Constructor
95 ~Cyg_Mbox(); // Destructor
97 void * get(); // get an item; wait if none
98 #ifdef CYGFUN_KERNEL_THREADS_TIMER
99 void * get( cyg_tick_count timeout );
101 void * tryget(); // just one attempt
103 void * peek_item(); // Get next item to be returned
104 // without removing it
106 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT // then we support it too
107 cyg_bool put( void *item ); // put an item; wait if full
108 #ifdef CYGFUN_KERNEL_THREADS_TIMER
109 cyg_bool put( void *item, cyg_tick_count timeout );
112 cyg_bool tryput( void *item ); // fails if Q full
115 cyg_count32 peek() // Get current count value
121 cyg_bool waiting_to_get() // Any threads waiting to get?
123 return m.waiting_to_get();
126 cyg_bool waiting_to_put() // Any threads waiting to put?
128 return m.waiting_to_put();
134 // -------------------------------------------------------------------------
135 #endif // ifndef CYGONCE_KERNEL_MBOX_HXX