RTEMS 4.9.4 On-Line Library

Memory Pool Manager tget_blk - Get Variable-Size Memory Block with Timeout

RTEMS ITRON 3.0 API User's Guide

9.4.5: tget_blk - Get Variable-Size Memory Block with Timeout

CALLING SEQUENCE:

ER ercd =tget_blk(
  VP *p_blk,
  ID mplid,
  INT blksz,
  TMO tmout
);

STATUS CODES:

E_OK - Normal Completion

E_ID - Invalid ID number (mplid was invalid or could not be used)

E_NOEXS - Object does not exist (the memorypool specified by mplid does not exist)

E_OACV - Object access violation (A mplid less than -4 was specified from a user task. This is implementation dependent.)

E_PAR - Parameter error (tmout is -2 or less, blksz is negative or invalid)

E_DLT - The object being waited for was deleted (the specified memorypool was deleted while waiting)

E_RLWAI - WAIT state was forcibly released (rel_wai was received while waiting)

E_TMOUT - Polling failure or timeout

E_CTX - Context error (issued from task-independent portions or a task in dispatch disabled state; implementation dependent for pget_blk and tget_blk(tmout=TMO_POL))

DESCRIPTION:

The tget_blk system call has the same function as get_blk with an additional timeout feature. A maximum wait time (timeout value) can be specified using the parameter tmout. When a timeout is specified, a timeout error, E_TMOUT, will result and the system call will finish if the period specified by tmout elapses without conditions for releasing wait being satisfied (i.e. without sufficient free memory becoming available).

NOTES:

NONE

RTEMS ITRON 3.0 API User's Guide