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ucontext(3) [osx man page]

UCONTEXT(3)						   BSD Library Functions Manual 					       UCONTEXT(3)

ucontext -- user thread context LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ucontext.h> DESCRIPTION
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 *); SEE ALSO
sigaltstack(2), getcontext(3), makecontext(3) BSD
September 10, 2002 BSD

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ucontext.h(3HEAD)						      Headers							 ucontext.h(3HEAD)

ucontext.h, ucontext - user context SYNOPSIS
#include <ucontext.h> DESCRIPTION
The <ucontext.h> header defines the ucontext_t type as a structure that includes at least the following members: ucontext_t uc_link sigset_t uc_sigmask stack_t uc_stack mcontext_t uc_mcontext The uc_link member is a pointer to the context that to be resumed when this context returns. If uc_link is equal to 0, this context is the main context and the process exits when this context returns. The uc_sigmask member defines the set of signals that are blocked when this context is active. See sigprocmask(2). The uc_stack member defines the stack used by this context. See sigaltstack(2). The uc_mcontext member contains the saved set of machine registers and any implementation-specific context data. Portable applications should not modify or access uc_mcontext. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
getcontext(2), sigaction(2), sigaltstack(2), sigprocmask(2), makecontext(3C), attributes(5), standards(5) SunOS 5.11 30 Aug 2002 ucontext.h(3HEAD)
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