CBL_ALLOC_SHMEM

Dynamically allocates shared memory.

Syntax:

call "CBL_ALLOC_SHMEM" using     mem-pointer
                       by value  mem-size
                       returning status-code

Parameters:

	Using call prototype (see Key)	Picture
`mem-pointer`	cblt-pointer	usage pointer. Must be level 01.
`mem-size`	cblt-os-size	pic x(4) comp-5 or pic x(8) comp-5 (64-bit native programs only)
`status-code`	See Library Routines - Key

Using call prototype (see Key)

Picture

mem-pointer

cblt-pointer

usage pointer. Must be level 01.

mem-size

cblt-os-size

pic x(4) comp-5

pic x(8) comp-5 (64-bit native programs only)

status-code

See Library Routines - Key

On Entry:

mem-size: The number of bytes of memory to allocate.

On Exit:

mem-pointer

A pointer to the memory allocated. The allocated memory is not initialized.

status-code

0	Successful allocation
157	Unable to allocate memory

Comments:

The memory allocated is not initialized to any value.

Updates to any shared memory allocated to this function are not serialized or protected by the run-time system; you should use semaphores to maintain the integrity of the data.

The maximum size of shared memory is restricted by the operating system and the run-time system. The run-time tunable, shared_memory_segment_size, can be used to set the maximum size. The size for shared memory allocated using this routine is limited to a maximum of around 64000 bytes.