MPE/iX Intrinsics Reference Manual (32650-90875)

Chapter 10 621
Command Definitions (QUIT-ZSIZE)
SUSPEND
SUSPEND
NM and CM callable.
Suspends a process. Process handling (PH) capability is required.
Syntax
U16V I16V
SUSPEND(
allow , rin );
Parameters
allow 16-bit unsigned integer by value (required)
Passes the anticipated source of the call and, later, reactivates the process,
as indicated by bits (14:1) and (15:1):
Bits Value/Meaning
15:1 Parent activation bit:
0 Process does not expect to be activated by its parent
1 Process expects to be activated by its parent
14:1 Child activation bit:
0 Process does not expect to be activated by one of its
children
1 Process expects to be activated by one of its children
NOTE If the process is running with only process handling (PH) capability, at least
one of these bits must = 1.
If (14:1)=1 and (15:1)=1, either the parent or a child can activate the
suspended process.
Bits (0:14) are reserved for the operating system.
rin 16-bit signed integer by value (optional)
Passes the resource identification number (RIN). If
rin is specified, it
represents a local RIN that is locked by the process but is released when
this process is suspended. This facility can be used to synchronize
processes within the same job.
Operation Notes
When SUSPEND is executed, the calling process relinquishes its access to the CPU until
reactivated by an ACTIVATE intrinsic call. The calling process must specify the anticipated
source of the ACTIVATE call (its parent or a child process). When the process is reactivated,