osdPoolStatus.c File Reference

#include <rtems/malloc.h>
#include "osiPoolStatus.h"

Include dependency graph for osdPoolStatus.c:

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Functions
LIBCOM_API int epicsStdCall	osiSufficentSpaceInPool (size_t contiguousBlockSize)
	Checks if a memory block of a specific size can be safely allocated. More...

Function Documentation

LIBCOM_API int epicsStdCall osiSufficentSpaceInPool

(

size_t

contiguousBlockSize

)

Checks if a memory block of a specific size can be safely allocated.

The meaning of "safely allocated" is target-specific, some additional free space is usually necessary to keep the system running reliably. On vxWorks this returns True if at least 100000 bytes is free.

Note

This routine is called quite frequently by the IOC so an efficent implementation is important.

Parameters

contiguousBlockSize

Block size to check.

Returns

True if the requested memory should be available.

Definition at line 17 of file osdPoolStatus.c.

{
    rtems_malloc_statistics_t s;
    unsigned long n;

    malloc_get_statistics(&s);
    n = s.space_available - (unsigned long)(s.lifetime_allocated - s.lifetime_freed);
    return (n > (50000 + contiguousBlockSize));
}