ucontext(3)

NAME

ucontext - user thread context

Standard C Library (libc, -lc)

#include <ucontext.h>

The ucontext_t type is a structure type suitable for holding
the context for a user thread of execution. A thread's context includes
its stack, saved registers, and list of blocked signals.
The ucontext_t structure contains at least these fields:: ucontext_t *uc_link context to assume when this; one returns
sigset_t uc_sigmask signals being blocked stack_t uc_stack stack area mcontext_t uc_mcontext saved registers
The uc_link field points to the context to resume when this
context's
entry point function returns. If uc_link is equal to NULL,
then the process exits when this context returns.
The uc_mcontext field is machine-dependent and should be
treated as opaque by portable applications.
The following functions are defined to manipulate ucontext_t
structures:: int getcontext(ucontext_t *);
int setcontext(const ucontext_t *);
void makecontext(ucontext_t *, void (*)(void), int, ...);
int swapcontext(ucontext_t *, const ucontext_t *);