[ECOS] question about "new" overloading function

["Tony Ko" <nhko at gctsemi dot com>]

Hi.
Look at code below, this code is from kapi.cxx.

// ---------------------------------------------------------------------
----
// Magic new function

inline void *operator new(size_t size, void *ptr)
{
    CYG_CHECK_DATA_PTR( ptr, "Bad pointer" );
    return ptr;
}

// ---------------------------------------------------------------------
----

/*----------------------------------------------------------------------
-----*/
/* Thread operations */

externC void cyg_thread_create(
    cyg_addrword_t      sched_info,             /* scheduling info (eg
pri)  */
    cyg_thread_entry_t  *entry,                 /* entry point function
*/
    cyg_addrword_t      entry_data,             /* entry data
*/
    char                *name,                  /* optional thread name
*/
    void                *stack_base,            /* stack base, NULL =
alloc  */
    cyg_ucount32        stack_size,             /* stack size, 0 =
default   */
    cyg_handle_t        *handle,                /* returned thread
handle    */
    cyg_thread          *thread                 /* put thread here
*/
)
{
    CYG_ASSERT_SIZES( cyg_thread, Cyg_Thread );

    Cyg_Thread *t = new((void *)thread) Cyg_Thread (
        (CYG_ADDRWORD) sched_info,
        (cyg_thread_entry *)entry,
        (CYG_ADDRWORD) entry_data,
        name,
        (CYG_ADDRWORD) stack_base,
        stack_size
        );
    t=t;
    
    CYG_CHECK_DATA_PTR( handle, "Bad handle pointer" );
    *handle = (cyg_handle_t)thread;
}

I wonder about HOW this "new" operate.

thanks in advance.

Tony (Nohi Ko)
_ _

GCT, Goodmorning Tower,Youido,Seoul,Korea. Tel:+82-2-2167-1283
Mobile : 016-368-7742  URL: www.gctsemi.com
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