https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278459
Bug ID: 278459
Summary: Add pthread_sigqueue()
Product: Base System
Version: 14.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Linux and Solaris 11 offer pthread_sigqueue(3) that is to sigqueue(2) what
pthread_kill(3) is to kill(2). I've been using pthread_sigqueue() on my own
software to offer different "cancellation paths". To illustrate my need, here
is the piece of the code that I want to be cancellable:
https://gitlab.com/emilua/emilua/-/blob/v0.7.1/src/file.cpp#L520-532
As you can see, I use setjmp() for a switch expression that will allow me to
jump to different cancel-handling paths.
Here's the cancellation type-1:
https://gitlab.com/emilua/emilua/-/blob/v0.7.1/src/file.cpp#L463
Here's cancellation type-2:
https://gitlab.com/emilua/emilua/-/blob/v0.7.1/src/file.cpp#L93
Both cancellators just use pthread_sigqueue(). Cancellator type-1 will use
sigval::sival_int=1 and cancellator type-2 will use sigval::sival_int=2 The
sighandler (SA_SIGINFO) will use this value as an argument to longjmp():
https://gitlab.com/emilua/emilua/-/blob/v0.7.1/src/core.cpp#L756
Can FreeBSD have pthread_sigqueue() as in Linux and Solaris?
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