musl/include/ucontext.h

#ifndef _UCONTEXT_H
#define _UCONTEXT_H
#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>

#include <signal.h>

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define NGREG (sizeof(gregset_t)/sizeof(greg_t))
#endif

struct __ucontext;

int  getcontext(struct __ucontext *);
void makecontext(struct __ucontext *, void (*)(void), int, ...);
int  setcontext(const struct __ucontext *);
int  swapcontext(struct __ucontext *, const struct __ucontext *);

#ifdef __cplusplus
}
#endif
#endif
initial check-in, version 0.5.0 2011-02-12 08:22:29 +03:00			`#ifndef _UCONTEXT_H`
			`#define _UCONTEXT_H`
			`#ifdef __cplusplus`
			`extern "C" {`
			`#endif`

default features: make musl usable without feature test macros the old behavior of exposing nothing except plain ISO C can be obtained by defining __STRICT_ANSI__ or using a compiler option (such as -std=c99) that predefines it. the new default featureset is POSIX with XSI plus _BSD_SOURCE. any explicit feature test macros will inhibit the default. installation docs have also been updated to reflect this change. 2012-09-08 07:13:55 +04:00			`#include <features.h>`

initial check-in, version 0.5.0 2011-02-12 08:22:29 +03:00			`#include <signal.h>`

fixup mcontext stuff to expost gregset_t/fpregset_t as appropriate 2012-11-26 08:04:23 +04:00			`#if defined(_GNU_SOURCE) \|\| defined(_BSD_SOURCE)`
			`#define NGREG (sizeof(gregset_t)/sizeof(greg_t))`
support the ugly and deprecated ucontext and sigcontext header stuff... only the structures, not the functions from ucontext.h, are supported at this point. the main goal of this commit is to make modern gcc with dwarf2 unwinding build without errors. honestly, it probably doesn't matter how we define these as long as they have members with the right names to prevent errors while compiling libgcc. the only time they will be used is for propagating exceptions across signal-handler boundaries, which invokes undefined behavior anyway. but as-is, they're probably correct and may be useful to various low-level applications dealing with virtualization, jit code generation, and so on... 2011-02-19 06:03:03 +03:00			`#endif`
initial check-in, version 0.5.0 2011-02-12 08:22:29 +03:00
avoid errors in ucontext.h when no feature test macros are defined 2011-06-30 01:13:01 +04:00			`struct __ucontext;`

			`int getcontext(struct __ucontext *);`
			`void makecontext(struct __ucontext , void ()(void), int, ...);`
consistency: use struct __ucontext instead of ucontext_t in prototypes this is necessary to avoid build errors if feature test macros are not properly defined when including ucontext.h 2011-07-31 08:10:29 +04:00			`int setcontext(const struct __ucontext *);`
avoid errors in ucontext.h when no feature test macros are defined 2011-06-30 01:13:01 +04:00			`int swapcontext(struct __ucontext , const struct __ucontext );`
initial check-in, version 0.5.0 2011-02-12 08:22:29 +03:00
			`#ifdef __cplusplus`
			`}`
			`#endif`
			`#endif`