Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

System Functions (n - p) pthread_setcanceltype(2)
• Link the application to the zputdll library (/G/system/zdllnnn/zputdll).
On systems running H06.24 or later H-series RVUs or J06.13 or later J-series RVUs, you can use
the POSIX User Thread Model library with 32-bit or 64-bit threaded applications.
To use this function in a 32-bit threaded application that uses the POSIX User Thread Model
library on systems running H06.24 or later RVUs or J06.13 or later RVUs, perform the same
tasks (described above) used to enable the POSIX User Thread Model library on systems running
H06.21/J06.10 or later RVUs.
To use this function in a 64-bit threaded application that uses the POSIX User Thread Model
library on systems running H06.24 or later RVUs or J06.13 or later RVUs, you must perform all
of the following tasks:
• Include the pthread.h header file in the application.
• Compile the application using the _PUT_MODEL_ feature test macro or equivalent
compiler command option.
• Compile the application using the -Wlp64 compiler command option.
• Link the application to the yputdll library (/G/system/zdllnnn/yputdll).
To use this function in a threaded application that uses the Standard POSIX Threads library on
systems running H06.21 or later RVUs or J06.10 or later RVUs, you must perform all of the fol-
lowing tasks:
• Include the spthread.h header file in the application.
• Compile the application using the _SPT_MODEL_ feature test macro or equivalent
compiler command option.
• Link the application to the zsptdll library (/G/system/zdllnnn/zsptdll).
NOTES
If the asynchronous cancelability type is set, do not call any function unless it is explicitly docu-
mented as safe to be called with the asynchronous cancelability type. The only safe functions are
pthread_setcanceltype() and pthread_setcancelstate().
The asynchronous cancelability type should be used only when you have a compute-bound sec-
tion of code that carries no state and makes no function calls.
RETURN VALUES
On successful completion, this function returns the calling thread’s previous cancelability type in
the oldtype parameter.
If an error condition occurs, this function returns an integer value indicating the type of error.
Possible return values are:
0 Successful completion.
[EINVAL] The specified type is not PTHREAD_CANCEL_DEFERRED or
PTHREAD_CANCEL_ASYNCHRONOUS.
[ENOTSUP] The specified type is PTHREAD_CANCEL_ASYNCHRONOUS.
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