rmalloc(9r) [osf1 man page]

rmalloc(9r)															       rmalloc(9r)

NAME

       rmalloc - General: Allocates size units from the given resource map

SYNOPSIS

       long rmalloc(
	       struct map *map_struct,
	       long size );

ARGUMENTS

       Specifies a pointer to a map structure that was previously initialized by a call to rminit.  Specifies the size of the units to allocate.

DESCRIPTION

       The rmalloc routine allocates size units from the given resource map. In a map, the addresses are increasing, and the list is terminated by
       a zero size.  The actual units managed by the map are arbitrary and can be map registers, bytes, blocks, and so forth.

NOTES

       The caller is responsible for providing any locking necessary for the map structure that the system passes to the rmalloc routine.

RETURN VALUES

       The rmalloc routine returns the base of the allocated space. It returns an error if no space could be allocated.

SEE ALSO

       Routines: rmfree(9r), rmget(9r), rminit(9r)

																       rmalloc(9r)

rmfree(9F)						   Kernel Functions for Drivers 						rmfree(9F)

NAME

       rmfree - free space back into a resource map

SYNOPSIS

       #include <sys/map.h>
       #include <sys/ddi.h>

       void rmfree(struct map *mp, size_t size, ulong_t index);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       mp	Pointer to the map structure.

       size	Number of units being freed.

       index	Index of the first unit of the allocated resource.

DESCRIPTION

       rmfree() releases space back into a resource map. It is the opposite of rmalloc(9F), which allocates space that is controlled by a resource
       map structure.

       When releasing resources using rmfree() the size and index passed to rmfree() must exactly match the size and index values  passed  to  and
       returned from a previous call to rmalloc(). Resources cannot be returned piecemeal.

       Drivers	may define resource maps for resource allocation, in terms of arbitrary units, using the rmallocmap(9F) function. The system main-
       tains the resource map structure by size and index, computed in units appropriate  for  the  resource.  For  example,  units  may  be  byte
       addresses, pages of memory, or blocks. rmfree() frees up unallocated space for re-use.

       rmfree() can also be used to initialize a resource map, in which case the size and index should cover the entire resource area.

CONTEXT

       rmfree() can be called from user or interrupt context.

SEE ALSO

       rmalloc(9F), rmalloc_wait(9F), rmallocmap(9F), rmfreemap(9F)

       Writing Device Drivers

SunOS 5.10							    4 Jun 2001								rmfree(9F)