diff options
Diffstat (limited to 'erts/emulator/sys/common/erl_poll.h')
| -rw-r--r-- | erts/emulator/sys/common/erl_poll.h | 281 |
1 files changed, 170 insertions, 111 deletions
diff --git a/erts/emulator/sys/common/erl_poll.h b/erts/emulator/sys/common/erl_poll.h index b3b4d79984..e9a667cac1 100644 --- a/erts/emulator/sys/common/erl_poll.h +++ b/erts/emulator/sys/common/erl_poll.h @@ -18,11 +18,31 @@ * %CopyrightEnd% */ -/* - * Description: Poll interface suitable for ERTS with or without - * SMP support. +/** + * @description: Poll interface suitable for ERTS with SMP support. + * + * @author: Rickard Green + * @author: Lukas Larsson + * + * This header file exports macros and functions that are used to + * react to I/O polling events from file descriptors or wait-able + * objects. The API exported is the following: * - * Author: Rickard Green + * defines: + * ERTS_POLL_EV_NONE - No events have been set. This is not the same as 0. + * ERTS_POLL_EV_IN - Represent an IN event + * ERTS_POLL_EV_OUT - Represent an OUT event + * ERTS_POLL_EV_ERR - Represent an error event + * ERTS_POLL_EV_NVAL - Represent an invalid event + * + * macro functions: + * ErtsSysFdType ERTS_POLL_RES_GET_FD(ErtsPollResFd *evt); + * void ERTS_POLL_RES_SET_FD(ErtsPollResFd *evt, ErtsSysFdType fd); + * ErtsPollEvents ERTS_POLL_RES_GET_EVTS(ErtsPollResFd *evt) + * void ERTS_POLL_RES_SET_EVTS(ErtsPollResFd *evt, ErtsPollEvents fd); + * + * functions: + * See erl_poll_api.h */ #ifndef ERL_POLL_H__ @@ -32,33 +52,27 @@ #define ERTS_POLL_NO_TIMEOUT ERTS_MONOTONIC_TIME_MIN -#if 0 -#define ERTS_POLL_COUNT_AVOIDED_WAKEUPS -#endif - #ifdef ERTS_ENABLE_KERNEL_POLL -# if defined(ERTS_KERNEL_POLL_VERSION) -# define ERTS_POLL_EXPORT(FUNC) FUNC ## _kp +# undef ERTS_ENABLE_KERNEL_POLL +# define ERTS_ENABLE_KERNEL_POLL 1 +# if defined(ERTS_NO_KERNEL_POLL_VERSION) +# define ERTS_POLL_EXPORT(FUNC) FUNC ## _flbk +# undef ERTS_NO_KERNEL_POLL_VERSION +# define ERTS_NO_KERNEL_POLL_VERSION 1 +# define ERTS_KERNEL_POLL_VERSION 0 # else -# define ERTS_POLL_EXPORT(FUNC) FUNC ## _nkp -# undef ERTS_POLL_DISABLE_KERNEL_POLL -# define ERTS_POLL_DISABLE_KERNEL_POLL +# undef ERTS_KERNEL_POLL_VERSION +# define ERTS_KERNEL_POLL_VERSION 1 +# define ERTS_NO_KERNEL_POLL_VERSION 0 +# define ERTS_POLL_EXPORT(FUNC) FUNC # endif #else # define ERTS_POLL_EXPORT(FUNC) FUNC -# undef ERTS_POLL_DISABLE_KERNEL_POLL -# define ERTS_POLL_DISABLE_KERNEL_POLL -#endif - -#ifdef ERTS_POLL_DISABLE_KERNEL_POLL -# undef HAVE_SYS_EPOLL_H -# undef HAVE_SYS_EVENT_H -# undef HAVE_SYS_DEVPOLL_H +# define ERTS_ENABLE_KERNEL_POLL 0 +# define ERTS_NO_KERNEL_POLL_VERSION 1 +# define ERTS_KERNEL_POLL_VERSION 0 #endif -#undef ERTS_POLL_USE_KERNEL_POLL -#define ERTS_POLL_USE_KERNEL_POLL 0 - #undef ERTS_POLL_USE_KQUEUE #define ERTS_POLL_USE_KQUEUE 0 #undef ERTS_POLL_USE_EPOLL @@ -70,68 +84,96 @@ #undef ERTS_POLL_USE_SELECT #define ERTS_POLL_USE_SELECT 0 -#if defined(HAVE_SYS_EVENT_H) -# undef ERTS_POLL_USE_KQUEUE -# define ERTS_POLL_USE_KQUEUE 1 -# undef ERTS_POLL_USE_KERNEL_POLL -# define ERTS_POLL_USE_KERNEL_POLL 1 -#elif defined(HAVE_SYS_EPOLL_H) -# undef ERTS_POLL_USE_EPOLL -# define ERTS_POLL_USE_EPOLL 1 -# undef ERTS_POLL_USE_KERNEL_POLL -# define ERTS_POLL_USE_KERNEL_POLL 1 -#elif defined(HAVE_SYS_DEVPOLL_H) -# undef ERTS_POLL_USE_DEVPOLL -# define ERTS_POLL_USE_DEVPOLL 1 -# undef ERTS_POLL_USE_KERNEL_POLL -# define ERTS_POLL_USE_KERNEL_POLL 1 +/* Defines which structure that erts_poll_wait should use to wait with + and how events should be represented */ +#define ERTS_POLL_USE_EPOLL_EVS 0 +#define ERTS_POLL_USE_KQUEUE_EVS 0 +#define ERTS_POLL_USE_DEVPOLL_EVS 0 +#define ERTS_POLL_USE_POLL_EVS 0 +#define ERTS_POLL_USE_SELECT_EVS 0 + +#define ERTS_POLL_USE_KERNEL_POLL ERTS_KERNEL_POLL_VERSION + +#if ERTS_ENABLE_KERNEL_POLL +# if defined(HAVE_SYS_EVENT_H) +# undef ERTS_POLL_USE_KQUEUE_EVS +# define ERTS_POLL_USE_KQUEUE_EVS 1 +# undef ERTS_POLL_USE_KQUEUE +# define ERTS_POLL_USE_KQUEUE ERTS_KERNEL_POLL_VERSION +# elif defined(HAVE_SYS_EPOLL_H) +# undef ERTS_POLL_USE_EPOLL_EVS +# define ERTS_POLL_USE_EPOLL_EVS 1 +# undef ERTS_POLL_USE_EPOLL +# define ERTS_POLL_USE_EPOLL ERTS_KERNEL_POLL_VERSION +# elif defined(HAVE_SYS_DEVPOLL_H) +# undef ERTS_POLL_USE_DEVPOLL_EVS +# define ERTS_POLL_USE_DEVPOLL_EVS 1 +# undef ERTS_POLL_USE_DEVPOLL +# define ERTS_POLL_USE_DEVPOLL ERTS_KERNEL_POLL_VERSION +# else +# error "Missing kernel poll implementation of erts_poll()" +# endif #endif -#define ERTS_POLL_USE_FALLBACK (ERTS_POLL_USE_KQUEUE || ERTS_POLL_USE_EPOLL) - -#if !ERTS_POLL_USE_KERNEL_POLL || ERTS_POLL_USE_FALLBACK +#if ERTS_NO_KERNEL_POLL_VERSION # if defined(ERTS_USE_POLL) +# undef ERTS_POLL_USE_POLL_EVS +# define ERTS_POLL_USE_POLL_EVS 1 # undef ERTS_POLL_USE_POLL # define ERTS_POLL_USE_POLL 1 # elif !defined(__WIN32__) +# undef ERTS_POLL_USE_SELECT_EVS +# define ERTS_POLL_USE_SELECT_EVS 1 # undef ERTS_POLL_USE_SELECT # define ERTS_POLL_USE_SELECT 1 # endif #endif -#define ERTS_POLL_USE_TIMERFD 0 +#define ERTS_POLL_USE_FALLBACK (ERTS_POLL_USE_KQUEUE || ERTS_POLL_USE_EPOLL) typedef Uint32 ErtsPollEvents; -#undef ERTS_POLL_EV_E2N + +typedef enum { + ERTS_POLL_OP_ADD = 0, /* Add the FD to the pollset */ + ERTS_POLL_OP_MOD = 1, /* Modify the FD in the pollset */ + ERTS_POLL_OP_DEL = 2 /* Delete the FD from the pollset */ +} ErtsPollOp; + +#define op2str(op) (op == ERTS_POLL_OP_ADD ? "add" : \ + (op == ERTS_POLL_OP_MOD ? "mod" : "del")) #if defined(__WIN32__) /* --- win32 --------------------------------------- */ -#define ERTS_POLL_EV_IN 1 -#define ERTS_POLL_EV_OUT 2 -#define ERTS_POLL_EV_ERR 4 -#define ERTS_POLL_EV_NVAL 8 +#define ERTS_POLL_EV_IN 1 +#define ERTS_POLL_EV_OUT 2 +#define ERTS_POLL_EV_ERR 4 +#define ERTS_POLL_EV_NVAL 8 -#elif ERTS_POLL_USE_EPOLL /* --- epoll ------------------------------- */ +#define ERTS_POLL_EV_E2N(EV) (EV) +#define ERTS_POLL_EV_N2E(EV) (EV) -#include <sys/epoll.h> +#elif ERTS_POLL_USE_EPOLL_EVS /* --- epoll ------------------------------- */ -#ifdef HAVE_SYS_TIMERFD_H -#include <sys/timerfd.h> -#undef ERTS_POLL_USE_TIMERFD -#define ERTS_POLL_USE_TIMERFD 1 -#endif +#include <sys/epoll.h> #define ERTS_POLL_EV_E2N(EV) \ ((uint32_t) (EV)) #define ERTS_POLL_EV_N2E(EV) \ - ((ErtsPollEvents) (EV)) + ((ErtsPollEvents) (EV) & ~EPOLLONESHOT) #define ERTS_POLL_EV_IN ERTS_POLL_EV_N2E(EPOLLIN) #define ERTS_POLL_EV_OUT ERTS_POLL_EV_N2E(EPOLLOUT) #define ERTS_POLL_EV_NVAL ERTS_POLL_EV_N2E(EPOLLET) #define ERTS_POLL_EV_ERR ERTS_POLL_EV_N2E(EPOLLERR|EPOLLHUP) -#elif ERTS_POLL_USE_DEVPOLL /* --- devpoll ----------------------------- */ +typedef struct epoll_event ErtsPollResFd; + +#define ERTS_POLL_RES_GET_FD(evt) ((ErtsSysFdType)((evt)->data.fd)) +#define ERTS_POLL_RES_SET_FD(evt, ident) (evt)->data.fd = ident +#define ERTS_POLL_RES_GET_EVTS(evt) ERTS_POLL_EV_N2E((evt)->events) +#define ERTS_POLL_RES_SET_EVTS(evt, evts) (evt)->events = ERTS_POLL_EV_E2N(evts) + +#elif ERTS_POLL_USE_DEVPOLL_EVS /* --- devpoll ----------------------------- */ #include <sys/devpoll.h> @@ -145,12 +187,37 @@ typedef Uint32 ErtsPollEvents; #define ERTS_POLL_EV_NVAL ERTS_POLL_EV_N2E(POLLNVAL) #define ERTS_POLL_EV_ERR ERTS_POLL_EV_N2E(POLLERR|POLLHUP) -#elif ERTS_POLL_USE_KQUEUE /* --- kqueue ------------------------------ */ +typedef struct pollfd ErtsPollResFd; + +#define ERTS_POLL_RES_GET_FD(evt) ((ErtsSysFdType)((evt)->fd)) +#define ERTS_POLL_RES_SET_FD(evt, ident) (evt)->fd = ident +#define ERTS_POLL_RES_GET_EVTS(evt) ERTS_POLL_EV_N2E((evt)->revents) +#define ERTS_POLL_RES_SET_EVTS(evt, evts) (evt)->revents = ERTS_POLL_EV_E2N(evts) + +#elif ERTS_POLL_USE_KQUEUE_EVS /* --- kqueue ------------------------------ */ /* Kqueue use fallback defines (poll() or select()) */ + +#include <sys/event.h> + +#ifdef ERTS_USE_POLL +# undef ERTS_POLL_USE_POLL_EVS +# define ERTS_POLL_USE_POLL_EVS 1 +#elif !defined(__WIN32__) +# undef ERTS_POLL_USE_SELECT_EVS +# define ERTS_POLL_USE_SELECT_EVS 1 #endif -#if ERTS_POLL_USE_POLL /* --- poll -------------------------------- */ +typedef struct kevent ErtsPollResFd; + +#define ERTS_POLL_RES_GET_FD(evt) ((ErtsSysFdType)((evt)->ident)) +#define ERTS_POLL_RES_SET_FD(evt, fd) (evt)->ident = fd +#define ERTS_POLL_RES_GET_EVTS(evt) ERTS_POLL_EV_N2E((ErtsPollEvents)(evt)->udata) +#define ERTS_POLL_RES_SET_EVTS(evt, evts) (evt)->udata = (void*)(UWord)(ERTS_POLL_EV_E2N(evts)) + +#endif +#if ERTS_POLL_USE_POLL_EVS + /* --- poll -------------------------------- */ #include <poll.h> #define ERTS_POLL_EV_NKP_E2N(EV) \ @@ -169,7 +236,7 @@ typedef Uint32 ErtsPollEvents; #define ERTS_POLL_EV_NKP_NVAL ERTS_POLL_EV_N2E(POLLNVAL) #define ERTS_POLL_EV_NKP_ERR ERTS_POLL_EV_N2E(POLLERR|POLLHUP) -#elif ERTS_POLL_USE_SELECT /* --- select ------------------------------ */ +#elif ERTS_POLL_USE_SELECT_EVS /* --- select ------------------------------ */ #define ERTS_POLL_EV_NKP_E2N(EV) (EV) #define ERTS_POLL_EV_NKP_N2E(EV) (EV) @@ -195,73 +262,65 @@ typedef Uint32 ErtsPollEvents; #endif -typedef struct ErtsPollSet_ *ErtsPollSet; +#if !ERTS_ENABLE_KERNEL_POLL -typedef struct { - ErtsSysFdType fd; - ErtsPollEvents events; - int on; -} ErtsPollControlEntry; - -typedef struct { +typedef struct _ErtsPollResFd { ErtsSysFdType fd; ErtsPollEvents events; } ErtsPollResFd; +#define ERTS_POLL_RES_GET_FD(evt) (evt)->fd +#define ERTS_POLL_RES_SET_FD(evt, ident) (evt)->fd = (ident) +#define ERTS_POLL_RES_GET_EVTS(evt) ERTS_POLL_EV_N2E((evt)->events) +#define ERTS_POLL_RES_SET_EVTS(evt, evts) (evt)->events = ERTS_POLL_EV_E2N(evts) + +#endif + +#define ERTS_POLL_EV_NONE (UINT_MAX & ~(ERTS_POLL_EV_IN|ERTS_POLL_EV_OUT|ERTS_POLL_EV_NVAL|ERTS_POLL_EV_ERR)) + +#define ev2str(ev) \ + (((ev) == 0 || (ev) == ERTS_POLL_EV_NONE) ? "NONE" : \ + ((ev) == ERTS_POLL_EV_IN ? "IN" : \ + ((ev) == ERTS_POLL_EV_OUT ? "OUT" : \ + ((ev) == (ERTS_POLL_EV_IN|ERTS_POLL_EV_OUT) ? "IN|OUT" : \ + ((ev) & ERTS_POLL_EV_ERR ? "ERR" : \ + ((ev) & ERTS_POLL_EV_NVAL ? "NVAL" : "OTHER")))))) + + +typedef struct ERTS_POLL_EXPORT(erts_pollset) ErtsPollSet; + typedef struct { char *primary; - char *fallback; char *kernel_poll; Uint memory_size; - int poll_set_size; - int fallback_poll_set_size; + Uint poll_set_size; int lazy_updates; - int pending_updates; + Uint pending_updates; int batch_updates; int concurrent_updates; - int max_fds; -#ifdef ERTS_POLL_COUNT_AVOIDED_WAKEUPS - long no_avoided_wakeups; - long no_avoided_interrupts; - long no_interrupt_timed; -#endif + int is_fallback; + Uint max_fds; + Uint active_fds; + Uint poll_threads; } ErtsPollInfo; -#ifdef ERTS_POLL_NEED_ASYNC_INTERRUPT_SUPPORT -void ERTS_POLL_EXPORT(erts_poll_async_sig_interrupt)(ErtsPollSet); +#if defined(ERTS_POLL_USE_FALLBACK) && ERTS_KERNEL_POLL_VERSION +# undef ERTS_POLL_EXPORT +# define ERTS_POLL_EXPORT(FUNC) FUNC ## _flbk +# include "erl_poll_api.h" +# undef ERTS_POLL_EXPORT +# define ERTS_POLL_EXPORT(FUNC) FUNC +#elif !defined(ERTS_POLL_USE_FALLBACK) +# define ERTS_POLL_USE_FALLBACK 0 #endif -void ERTS_POLL_EXPORT(erts_poll_interrupt)(ErtsPollSet, - int); -void ERTS_POLL_EXPORT(erts_poll_interrupt_timed)(ErtsPollSet, - int, - ErtsMonotonicTime); -ErtsPollEvents ERTS_POLL_EXPORT(erts_poll_control)(ErtsPollSet, - ErtsSysFdType, - ErtsPollEvents, - int on, - int* wake_poller - ); -void ERTS_POLL_EXPORT(erts_poll_controlv)(ErtsPollSet, - ErtsPollControlEntry [], - int on); -int ERTS_POLL_EXPORT(erts_poll_wait)(ErtsPollSet, - ErtsPollResFd [], - int *, - ErtsMonotonicTime); -int ERTS_POLL_EXPORT(erts_poll_max_fds)(void); -void ERTS_POLL_EXPORT(erts_poll_info)(ErtsPollSet, - ErtsPollInfo *); -ErtsPollSet ERTS_POLL_EXPORT(erts_poll_create_pollset)(void); -void ERTS_POLL_EXPORT(erts_poll_destroy_pollset)(ErtsPollSet); -void ERTS_POLL_EXPORT(erts_poll_init)(void); -void ERTS_POLL_EXPORT(erts_poll_get_selected_events)(ErtsPollSet, - ErtsPollEvents [], - int); -int erts_poll_new_table_len(int old_len, int need_len); +#include "erl_poll_api.h" -#ifdef ERTS_ENABLE_LOCK_COUNT -void ERTS_POLL_EXPORT(erts_lcnt_update_pollset_locks)(int enable); -#endif +/** + * Get the next size of the array that holds the file descriptors. + * This function is used in order for the check io array and the + * pollset array to be of the same size. + */ +int erts_poll_new_table_len(int old_len, int need_len); #endif /* #ifndef ERL_POLL_H__ */ |