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_LWP_SUSPEND(2) FreeBSD System Calls Manual _LWP_SUSPEND(2) NAME _lwp_suspend, _lwp_continue - suspend or continue a light-weight process LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <lwp.h> int _lwp_suspend(lwpid_t lwp); int _lwp_continue(lwpid_t lwp); DESCRIPTION _lwp_suspend() suspends execution of the LWP specified by lwp. Once an LWP is suspended, subsequent calls to _lwp_suspend() have no effect. The only way to resume execution of a suspended LWP is via _lwp_continue(). _lwp_continue() resumes execution of the LWP specified by lwp. Once an LWP is resumed, subsequent calls to _lwp_continue() have no effect. RETURN VALUES The _lwp_continue() and _lwp_suspend() functions return the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS _lwp_suspend() and _lwp_continue() will fail if: [ESRCH] No LWP can be found in the current process corresponding to that specified by lwp. _lwp_suspend() will fail if: [EDEADLK] The LWP specified by lwp is the only LWP in the process. SEE ALSO _lwp_create(2) HISTORY The _lwp_create() system call first appeared in NetBSD 2.0. FreeBSD 14.1-RELEASE-p8 December 4, 2022 FreeBSD 14.1-RELEASE-p8