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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_UNIX_H_INCLUDED_
#define _NXT_UNIX_H_INCLUDED_
#if (NXT_LINUX)
#ifdef _FORTIFY_SOURCE
/*
* _FORTIFY_SOURCE
* may call sigaltstack() while _longjmp() checking;
* may cause _longjmp() to fail with message:
* "longjmp() causes uninitialized stack frame";
* does not allow to use "(void) write()";
* does surplus checks.
*/
#undef _FORTIFY_SOURCE
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* pread(), pwrite(), gethostname(). */
#endif
#define _FILE_OFFSET_BITS 64
#include <malloc.h> /* malloc_usable_size(). */
#include <sys/syscall.h> /* syscall(SYS_gettid). */
#if (__GLIBC__ >= 2 && __GLIBC_MINOR__ >= 4)
/*
* POSIX semaphores using NPTL atomic/futex operations
* were introduced during glibc 2.3 development time.
*/
#define NXT_HAVE_SEM_TRYWAIT_FAST 1
#endif
#endif /* NXT_LINUX */
#if (NXT_FREEBSD)
#if (NXT_HAVE_MALLOC_USABLE_SIZE)
#include <malloc_np.h> /* malloc_usable_size(). */
#endif
#if (__FreeBSD_version >= 900007)
/* POSIX semaphores using atomic/umtx. */
#define NXT_HAVE_SEM_TRYWAIT_FAST 1
#endif
#endif /* NXT_FREEBSD */
#if (NXT_SOLARIS)
#ifndef _FILE_OFFSET_BITS
#define _FILE_OFFSET_BITS 64 /* Must be before <sys/types.h>. */
#endif
#ifndef _REENTRANT /* May be set by "-mt" options. */
#define _REENTRANT /* Thread safe errno. */
#endif
#ifndef _POSIX_PTHREAD_SEMANTICS
#define _POSIX_PTHREAD_SEMANTICS /* 2 arguments in sigwait(). */
#endif
/*
* Solaris provides two sockets API:
*
* 1) 4.3BSD sockets (int instead of socklen_t in accept(), etc.;
* struct msghdr.msg_accrights) in libsocket;
* 2) X/Open sockets (socklen_t, struct msghdr.msg_control) with __xnet_
* function name prefix in libxnet and libsocket.
*/
/* Enable X/Open sockets API. */
#define _XOPEN_SOURCE
#define _XOPEN_SOURCE_EXTENDED 1
/* Enable Solaris extensions disabled by _XOPEN_SOURCE. */
#ifndef __EXTENSIONS__
#define __EXTENSIONS__
#endif
#endif /* NXT_SOLARIS */
#if (NXT_MACOSX)
#ifndef _DARWIN_C_SOURCE
#define _DARWIN_C_SOURCE /* pthread_threadid_np(), mach_port_t. */
#endif
#include <mach/mach_time.h> /* mach_absolute_time(). */
#include <malloc/malloc.h> /* malloc_size(). */
#endif /* NXT_MACOSX */
#if (NXT_AIX)
#define _THREAD_SAFE /* Must before any include. */
#endif /* NXT_AIX */
#if (NXT_HPUX)
#define _FILE_OFFSET_BITS 64
/*
* HP-UX provides three sockets API:
*
* 1) 4.3BSD sockets (int instead of socklen_t in accept(), etc.;
* struct msghdr.msg_accrights) in libc;
* 2) X/Open sockets (socklen_t, struct msghdr.msg_control) with _xpg_
* function name prefix in libc;
* 3) and X/Open sockets (socklen_t, struct msghdr.msg_control) in libxnet.
*/
/* Enable X/Open sockets API. */
#define _XOPEN_SOURCE
#define _XOPEN_SOURCE_EXTENDED
/* Enable static function wrappers for _xpg_ X/Open sockets API in libc. */
#define _HPUX_ALT_XOPEN_SOCKET_API
#include <sys/mpctl.h>
#if (NXT_HAVE_HG_GETHRTIME)
#include <sys/mercury.h>
#endif
#endif /* NXT_HPUX */
#if (NXT_HAVE_ALLOCA_H)
#include <alloca.h>
#endif
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <limits.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <poll.h>
#include <pwd.h>
#include <semaphore.h>
#include <setjmp.h>
#include <sched.h>
#include <signal.h>
#include <spawn.h>
#include <stdarg.h>
#include <stddef.h> /* offsetof() */
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#if (NXT_HAVE_SYS_FILIO_H)
#include <sys/filio.h> /* FIONBIO */
#endif
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/param.h> /* MAXPATHLEN */
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#if (NXT_HAVE_UNIX_DOMAIN)
#include <sys/un.h>
#endif
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#if (NXT_HAVE_EPOLL)
#include <sys/epoll.h>
#ifdef EPOLLRDHUP
/*
* Epoll edge-tiggered mode is pretty much useless without EPOLLRDHUP support.
*/
#define NXT_HAVE_EPOLL_EDGE 1
#endif
#endif
#if (NXT_HAVE_SIGNALFD)
#include <sys/signalfd.h>
#endif
#if (NXT_HAVE_EVENTFD)
#include <sys/eventfd.h>
#endif
#if (NXT_HAVE_KQUEUE)
#include <sys/event.h>
#endif
#if (NXT_HAVE_EVENTPORT)
#include <port.h>
#endif
#if (NXT_HAVE_DEVPOLL)
#include <sys/devpoll.h>
#endif
#if (NXT_HAVE_POLLSET)
#include <sys/pollset.h>
#endif
#if (NXT_HAVE_LINUX_SENDFILE)
#include <sys/sendfile.h>
#endif
#if (NXT_HAVE_SOLARIS_SENDFILEV)
#include <sys/sendfile.h>
#endif
#if (NXT_HAVE_GETRANDOM)
#include <sys/random.h> /* getrandom(). */
#elif (NXT_HAVE_LINUX_SYS_GETRANDOM)
#include <linux/random.h> /* SYS_getrandom. */
#elif (NXT_HAVE_GETENTROPY_SYS_RANDOM)
#include <sys/random.h> /* getentropy(). */
#endif
#if (NXT_HAVE_ISOLATION_ROOTFS)
#include <sys/mount.h>
#endif
#if (NXT_HAVE_OPENAT2)
#include <linux/openat2.h>
#endif
#if (NXT_TEST_BUILD)
#include <nxt_test_build.h>
#endif
/*
* On Linux IOV_MAX is 1024. Linux uses kernel stack for 8 iovec's
* to avoid kernel allocation/deallocation.
*
* On FreeBSD IOV_MAX is 1024. FreeBSD used kernel stack for 8 iovec's
* to avoid kernel allocation/deallocation until FreeBSD 5.2.
* FreeBSD 5.2 and later do not use stack at all.
*
* On Solaris IOV_MAX is 16 and Solaris uses only kernel stack.
*
* On MacOSX IOV_MAX is 1024. MacOSX used kernel stack for 8 iovec's
* to avoid kernel allocation/deallocation until MacOSX 10.4 (Tiger).
* MacOSX 10.4 and later do not use stack at all.
*
* On NetBSD, OpenBSD, and DragonFlyBSD IOV_MAX is 1024. All these OSes
* uses kernel stack for 8 iovec's to avoid kernel allocation/deallocation.
*
* On AIX and HP-UX IOV_MAX is 16.
*/
#define NXT_IOBUF_MAX 8
typedef struct iovec nxt_iobuf_t;
#define nxt_iobuf_data(iob) \
(iob)->iov_base
#define nxt_iobuf_size(iob) \
(iob)->iov_len
#define nxt_iobuf_set(iob, p, size) \
do { \
(iob)->iov_base = (void *) p; \
(iob)->iov_len = size; \
} while (0)
#define nxt_iobuf_add(iob, size) \
(iob)->iov_len += size
#endif /* _NXT_UNIX_H_INCLUDED_ */
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