[PATCH] Implement epoll_create1 and epoll_pwait system calls.
Peter Mazinger
ps.m at gmx.net
Fri May 13 00:03:29 UTC 2011
Hi
> Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
> ---
> libc/sysdeps/linux/common/epoll.c | 14 +++++++++++
> libc/sysdeps/linux/common/sys/epoll.h | 40
> +++++++++++++++++++++++++++++---
> libc/sysdeps/linux/x86_64/sys/epoll.h | 36
> ++++++++++++++++++++++++++++-
> 3 files changed, 85 insertions(+), 5 deletions(-)
>
> diff --git a/libc/sysdeps/linux/common/epoll.c
> b/libc/sysdeps/linux/common/epoll.c
> index dda9228..a5bd61b 100644
> --- a/libc/sysdeps/linux/common/epoll.c
> +++ b/libc/sysdeps/linux/common/epoll.c
> @@ -18,6 +18,13 @@ _syscall1(int, epoll_create, int, size)
> #endif
>
> /*
> + * epoll_create1()
> + */
> +#ifdef __NR_epoll_create1
> +_syscall1(int, epoll_create1, int, flags)
> +#endif
> +
> +/*
> * epoll_ctl()
> */
> #ifdef __NR_epoll_ctl
> @@ -30,3 +37,10 @@ _syscall4(int,epoll_ctl, int, epfd, int, op, int, fd,
> struct epoll_event *, even
> #ifdef __NR_epoll_wait
> _syscall4(int, epoll_wait, int, epfd, struct epoll_event *, events, int,
> maxevents, int, timeout)
> #endif
> +
> +/*
> + * epoll_pwait()
> + */
> +#ifdef __NR_epoll_pwait
> +_syscall5(int, epoll_pwait, int, epfd, struct epoll_event *, events, int,
> maxevents, int, timeout, __const sigset_t *, ss)
this is a _syscall6, taking _NSIG / 8 as last argument
> +#endif
> diff --git a/libc/sysdeps/linux/common/sys/epoll.h
> b/libc/sysdeps/linux/common/sys/epoll.h
> index 44e814b..ca1d3d0 100644
> --- a/libc/sysdeps/linux/common/sys/epoll.h
> +++ b/libc/sysdeps/linux/common/sys/epoll.h
> @@ -1,4 +1,4 @@
> -/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
> +/* Copyright (C) 2002-2006, 2007, 2008, 2009 Free Software Foundation,
> Inc.
> This file is part of the GNU C Library.
>
> The GNU C Library is free software; you can redistribute it and/or
> @@ -22,6 +22,24 @@
> #include <stdint.h>
> #include <sys/types.h>
>
> +/* Get __sigset_t. */
> +#include <bits/sigset.h>
> +
> +#ifndef __sigset_t_defined
> +# define __sigset_t_defined
> +typedef __sigset_t sigset_t;
> +#endif
> +
> +
> +/* Flags to be passed to epoll_create1. */
> +enum
> + {
> + EPOLL_CLOEXEC = 02000000,
> +#define EPOLL_CLOEXEC EPOLL_CLOEXEC
> + EPOLL_NONBLOCK = 04000
> +#define EPOLL_NONBLOCK EPOLL_NONBLOCK
> + };
> +
>
> enum EPOLL_EVENTS
> {
> @@ -55,9 +73,9 @@ enum EPOLL_EVENTS
>
>
> /* Valid opcodes ( "op" parameter ) to issue to epoll_ctl(). */
> -#define EPOLL_CTL_ADD 1 /* Add a file decriptor to the interface. */
> -#define EPOLL_CTL_DEL 2 /* Remove a file decriptor from the interface.
> */
> -#define EPOLL_CTL_MOD 3 /* Change file decriptor epoll_event structure.
> */
> +#define EPOLL_CTL_ADD 1 /* Add a file descriptor to the interface. */
> +#define EPOLL_CTL_DEL 2 /* Remove a file descriptor from the interface.
> */
> +#define EPOLL_CTL_MOD 3 /* Change file descriptor epoll_event structure.
> */
>
>
> typedef union epoll_data
> @@ -83,6 +101,10 @@ __BEGIN_DECLS
> returned by epoll_create() should be closed with close(). */
> extern int epoll_create (int __size) __THROW;
>
> +/* Same as epoll_create but with an FLAGS parameter. The unused SIZE
> + parameter has been dropped. */
> +extern int epoll_create1 (int __flags) __THROW;
> +
>
> /* Manipulate an epoll instance "epfd". Returns 0 in case of success,
> -1 in case of error ( the "errno" variable will contain the
> @@ -107,6 +129,16 @@ extern int epoll_ctl (int __epfd, int __op, int __fd,
> extern int epoll_wait (int __epfd, struct epoll_event *__events,
> int __maxevents, int __timeout);
>
> +
> +/* Same as epoll_wait, but the thread's signal mask is temporarily
> + and atomically replaced with the one provided as parameter.
> +
> + This function is a cancellation point and therefore not marked with
> + __THROW. */
> +extern int epoll_pwait (int __epfd, struct epoll_event *__events,
> + int __maxevents, int __timeout,
> + __const __sigset_t *__ss);
> +
> __END_DECLS
>
> #endif /* sys/epoll.h */
> diff --git a/libc/sysdeps/linux/x86_64/sys/epoll.h
> b/libc/sysdeps/linux/x86_64/sys/epoll.h
> index 02672d3..d799c84 100644
> --- a/libc/sysdeps/linux/x86_64/sys/epoll.h
> +++ b/libc/sysdeps/linux/x86_64/sys/epoll.h
> @@ -1,4 +1,4 @@
> -/* Copyright (C) 2002,2003,2004,2005,2006 Free Software Foundation, Inc.
> +/* Copyright (C) 2002-2008, 2010 Free Software Foundation, Inc.
> This file is part of the GNU C Library.
>
> The GNU C Library is free software; you can redistribute it and/or
> @@ -22,6 +22,24 @@
> #include <stdint.h>
> #include <sys/types.h>
>
> +/* Get __sigset_t. */
> +#include <bits/sigset.h>
> +
> +#ifndef __sigset_t_defined
> +# define __sigset_t_defined
> +typedef __sigset_t sigset_t;
> +#endif
> +
> +
> +/* Flags to be passed to epoll_create1. */
> +enum
> + {
> + EPOLL_CLOEXEC = 02000000,
> +#define EPOLL_CLOEXEC EPOLL_CLOEXEC
> + EPOLL_NONBLOCK = 04000
> +#define EPOLL_NONBLOCK EPOLL_NONBLOCK
> + };
> +
>
> enum EPOLL_EVENTS
> {
> @@ -45,6 +63,8 @@ enum EPOLL_EVENTS
> #define EPOLLERR EPOLLERR
> EPOLLHUP = 0x010,
> #define EPOLLHUP EPOLLHUP
> + EPOLLRDHUP = 0x2000,
> +#define EPOLLRDHUP EPOLLRDHUP
> EPOLLONESHOT = (1 << 30),
> #define EPOLLONESHOT EPOLLONESHOT
> EPOLLET = (1 << 31)
> @@ -81,6 +101,10 @@ __BEGIN_DECLS
> returned by epoll_create() should be closed with close(). */
> extern int epoll_create (int __size) __THROW;
>
> +/* Same as epoll_create but with an FLAGS parameter. The unused SIZE
> + parameter has been dropped. */
> +extern int epoll_create1 (int __flags) __THROW;
> +
>
> /* Manipulate an epoll instance "epfd". Returns 0 in case of success,
> -1 in case of error ( the "errno" variable will contain the
> @@ -105,6 +129,16 @@ extern int epoll_ctl (int __epfd, int __op, int __fd,
> extern int epoll_wait (int __epfd, struct epoll_event *__events,
> int __maxevents, int __timeout);
>
> +
> +/* Same as epoll_wait, but the thread's signal mask is temporarily
> + and atomically replaced with the one provided as parameter.
> +
> + This function is a cancellation point and therefore not marked with
> + __THROW. */
> +extern int epoll_pwait (int __epfd, struct epoll_event *__events,
> + int __maxevents, int __timeout,
> + __const __sigset_t *__ss);
> +
> __END_DECLS
>
> #endif /* sys/epoll.h */
> --
> 1.7.5.1
>
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