pthread_detach (BPX1PTD, BPX4PTD) — Detach a thread

Function

The pthread_detach callable service detaches a thread in the calling process. When a thread is detached, its system storage can be reclaimed when the thread exits.

Requirements

Operation	Environment
Authorization:	Supervisor state or problem state, any PSW key
Dispatchable unit mode:	Task
Cross memory mode:	PASN = HASN
AMODE (BPX1PTD):	31-bit
AMODE (BPX4PTD):	64-bit
ASC mode:	Primary mode
Interrupt status:	Enabled for interrupts
Locks:	Unlocked
Control parameters:	All parameters must be addressable by the caller and in the primary address space.

Format

CALL BPX1PTD,(Thread_ID,
              Return_value,
              Return_code,
              Reason_code)

AMODE 64 callers use BPX4PTD with the same parameters.

Parameters

Thread_ID

Supplied parameter

Type:: Character string
Length:: 8 bytes

The name of an 8-byte field that contains the thread ID for the thread that is to be detached.

Return_value

Returned parameter

Type:: Integer
Length:: Fullword

The name of a fullword in which the pthread_detach service returns 0 if the request is successful, or -1 if it is not successful.

Return_code

Returned parameter

Type:: Integer
Length:: Fullword

The name of a fullword in which the pthread_detach service stores the return code. The pthread_detach service returns Return_code only if Return_value is -1. For a complete list of possible return code values, see z/OS UNIX System Services Messages and Codes. The pthread_detach service can return one of the following values in the Return_code parameter:

Return code	Explanation
EINVAL	The value that was specified by thread ID is not valid; it does not contain a value that is consistent with thread IDs managed by the system. The following reason code can accompany this return code: JRLightWeightThid.
ESRCH	The system has detected that the value that was specified by thread ID refers to a thread that is already detached or that cannot be found. The following reason codes can accompany this return code: JRThreadNotFound and JRAlreadyDetached.

Reason_code

Returned parameter

Type:: Integer
Length:: Fullword

The name of a fullword in which the pthread_detach service stores the reason code. The pthread_detach service returns Reason_code only if Return_value is -1. Reason_code further qualifies the Return_code value. For the reason codes, see z/OS UNIX System Services Messages and Codes.

Related services

Characteristics and restrictions

There are no restrictions on the use of the pthread_detach service.

Examples

For an example using this callable service, see BPX1PTC (pthread_create) example.