--- libev/ev.h 2011/02/16 08:02:50 1.159 +++ libev/ev.h 2019/07/01 21:47:42 1.194 @@ -1,7 +1,7 @@ /* * libev native API header * - * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann + * Copyright (c) 2007-2019 Marc Alexander Lehmann * All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- @@ -42,9 +42,16 @@ #ifdef __cplusplus # define EV_CPP(x) x +# if __cplusplus >= 201103L +# define EV_NOEXCEPT noexcept +# else +# define EV_NOEXCEPT +# endif #else # define EV_CPP(x) +# define EV_NOEXCEPT #endif +#define EV_THROW EV_NOEXCEPT /* pre-4.25, do not use in new code */ EV_CPP(extern "C" {) @@ -56,7 +63,11 @@ #endif #ifndef EV_FEATURES -# define EV_FEATURES 0x7f +# if defined __OPTIMIZE_SIZE__ +# define EV_FEATURES 0x7c +# else +# define EV_FEATURES 0x7f +# endif #endif #define EV_FEATURE_CODE ((EV_FEATURES) & 1) @@ -142,6 +153,8 @@ typedef double ev_tstamp; +#include /* for memmove */ + #ifndef EV_ATOMIC_T # include # define EV_ATOMIC_T sig_atomic_t volatile @@ -185,7 +198,13 @@ # define EV_INLINE static #endif -/* EV_PROTOTYPES can be sued to switch of prototype declarations */ +#ifdef EV_API_STATIC +# define EV_API_DECL static +#else +# define EV_API_DECL extern +#endif + +/* EV_PROTOTYPES can be used to switch of prototype declarations */ #ifndef EV_PROTOTYPES # define EV_PROTOTYPES 1 #endif @@ -193,33 +212,33 @@ /*****************************************************************************/ #define EV_VERSION_MAJOR 4 -#define EV_VERSION_MINOR 3 +#define EV_VERSION_MINOR 27 /* eventmask, revents, events... */ enum { - EV_UNDEF = 0xFFFFFFFF, /* guaranteed to be invalid */ - EV_NONE = 0x00, /* no events */ - EV_READ = 0x01, /* ev_io detected read will not block */ - EV_WRITE = 0x02, /* ev_io detected write will not block */ - EV__IOFDSET = 0x80, /* internal use only */ - EV_IO = EV_READ, /* alias for type-detection */ - EV_TIMER = 0x00000100, /* timer timed out */ + EV_UNDEF = (int)0xFFFFFFFF, /* guaranteed to be invalid */ + EV_NONE = 0x00, /* no events */ + EV_READ = 0x01, /* ev_io detected read will not block */ + EV_WRITE = 0x02, /* ev_io detected write will not block */ + EV__IOFDSET = 0x80, /* internal use only */ + EV_IO = EV_READ, /* alias for type-detection */ + EV_TIMER = 0x00000100, /* timer timed out */ #if EV_COMPAT3 - EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */ + EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */ #endif - EV_PERIODIC = 0x00000200, /* periodic timer timed out */ - EV_SIGNAL = 0x00000400, /* signal was received */ - EV_CHILD = 0x00000800, /* child/pid had status change */ - EV_STAT = 0x00001000, /* stat data changed */ - EV_IDLE = 0x00002000, /* event loop is idling */ - EV_PREPARE = 0x00004000, /* event loop about to poll */ - EV_CHECK = 0x00008000, /* event loop finished poll */ - EV_EMBED = 0x00010000, /* embedded event loop needs sweep */ - EV_FORK = 0x00020000, /* event loop resumed in child */ - EV_CLEANUP = 0x00040000, /* event loop resumed in child */ - EV_ASYNC = 0x00080000, /* async intra-loop signal */ - EV_CUSTOM = 0x01000000, /* for use by user code */ - EV_ERROR = 0x80000000 /* sent when an error occurs */ + EV_PERIODIC = 0x00000200, /* periodic timer timed out */ + EV_SIGNAL = 0x00000400, /* signal was received */ + EV_CHILD = 0x00000800, /* child/pid had status change */ + EV_STAT = 0x00001000, /* stat data changed */ + EV_IDLE = 0x00002000, /* event loop is idling */ + EV_PREPARE = 0x00004000, /* event loop about to poll */ + EV_CHECK = 0x00008000, /* event loop finished poll */ + EV_EMBED = 0x00010000, /* embedded event loop needs sweep */ + EV_FORK = 0x00020000, /* event loop resumed in child */ + EV_CLEANUP = 0x00040000, /* event loop resumed in child */ + EV_ASYNC = 0x00080000, /* async intra-loop signal */ + EV_CUSTOM = 0x01000000, /* for use by user code */ + EV_ERROR = (int)0x80000000 /* sent when an error occurs */ }; /* can be used to add custom fields to all watchers, while losing binary compatibility */ @@ -321,7 +340,7 @@ ev_tstamp offset; /* rw */ ev_tstamp interval; /* rw */ - ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ + ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) EV_NOEXCEPT; /* rw */ } ev_periodic; /* invoked when the given signal has been received */ @@ -497,26 +516,28 @@ /* method bits to be ored together */ enum { - EVBACKEND_SELECT = 0x00000001U, /* about anywhere */ - EVBACKEND_POLL = 0x00000002U, /* !win */ - EVBACKEND_EPOLL = 0x00000004U, /* linux */ - EVBACKEND_KQUEUE = 0x00000008U, /* bsd */ - EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */ - EVBACKEND_PORT = 0x00000020U, /* solaris 10 */ - EVBACKEND_ALL = 0x0000003FU, /* all known backends */ - EVBACKEND_MASK = 0x0000FFFFU /* all future backends */ + EVBACKEND_SELECT = 0x00000001U, /* available just about anywhere */ + EVBACKEND_POLL = 0x00000002U, /* !win, !aix, broken on osx */ + EVBACKEND_EPOLL = 0x00000004U, /* linux */ + EVBACKEND_KQUEUE = 0x00000008U, /* bsd, broken on osx */ + EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */ + EVBACKEND_PORT = 0x00000020U, /* solaris 10 */ + EVBACKEND_LINUXAIO = 0x00000040U, /* linuix AIO */ + EVBACKEND_IOURING = 0x00000080U, /* linux io_uring, TBD */ + EVBACKEND_ALL = 0x000000FFU, /* all known backends */ + EVBACKEND_MASK = 0x0000FFFFU /* all future backends */ }; #if EV_PROTOTYPES -int ev_version_major (void); -int ev_version_minor (void); +EV_API_DECL int ev_version_major (void) EV_NOEXCEPT; +EV_API_DECL int ev_version_minor (void) EV_NOEXCEPT; -unsigned int ev_supported_backends (void); -unsigned int ev_recommended_backends (void); -unsigned int ev_embeddable_backends (void); +EV_API_DECL unsigned int ev_supported_backends (void) EV_NOEXCEPT; +EV_API_DECL unsigned int ev_recommended_backends (void) EV_NOEXCEPT; +EV_API_DECL unsigned int ev_embeddable_backends (void) EV_NOEXCEPT; -ev_tstamp ev_time (void); -void ev_sleep (ev_tstamp delay); /* sleep for a while */ +EV_API_DECL ev_tstamp ev_time (void) EV_NOEXCEPT; +EV_API_DECL void ev_sleep (ev_tstamp delay) EV_NOEXCEPT; /* sleep for a while */ /* Sets the allocation function to use, works like realloc. * It is used to allocate and free memory. @@ -524,22 +545,26 @@ * or take some potentially destructive action. * The default is your system realloc function. */ -void ev_set_allocator (void *(*cb)(void *ptr, long size)); +EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT; /* set the callback function to call on a * retryable syscall error * (such as failed select, poll, epoll_wait) */ -void ev_set_syserr_cb (void (*cb)(const char *msg)); +EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT; #if EV_MULTIPLICITY /* the default loop is the only one that handles signals and child watchers */ /* you can call this as often as you like */ -struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)); +EV_API_DECL struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; + +#ifdef EV_API_STATIC +EV_API_DECL struct ev_loop *ev_default_loop_ptr; +#endif EV_INLINE struct ev_loop * -ev_default_loop_uc_ (void) +ev_default_loop_uc_ (void) EV_NOEXCEPT { extern struct ev_loop *ev_default_loop_ptr; @@ -547,31 +572,31 @@ } EV_INLINE int -ev_is_default_loop (EV_P) +ev_is_default_loop (EV_P) EV_NOEXCEPT { return EV_A == EV_DEFAULT_UC; } /* create and destroy alternative loops that don't handle signals */ -struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)); +EV_API_DECL struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; -ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ +EV_API_DECL ev_tstamp ev_now (EV_P) EV_NOEXCEPT; /* time w.r.t. timers and the eventloop, updated after each poll */ #else -int ev_default_loop (unsigned int flags EV_CPP (= 0)); /* returns true when successful */ +EV_API_DECL int ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_NOEXCEPT; /* returns true when successful */ + +EV_API_DECL ev_tstamp ev_rt_now; EV_INLINE ev_tstamp -ev_now (void) +ev_now (void) EV_NOEXCEPT { - extern ev_tstamp ev_rt_now; - return ev_rt_now; } /* looks weird, but ev_is_default_loop (EV_A) still works if this exists */ EV_INLINE int -ev_is_default_loop (void) +ev_is_default_loop (void) EV_NOEXCEPT { return 1; } @@ -579,23 +604,23 @@ #endif /* multiplicity */ /* destroy event loops, also works for the default loop */ -void ev_loop_destroy (EV_P); +EV_API_DECL void ev_loop_destroy (EV_P); /* this needs to be called after fork, to duplicate the loop */ /* when you want to re-use it in the child */ /* you can call it in either the parent or the child */ /* you can actually call it at any time, anywhere :) */ -void ev_loop_fork (EV_P); +EV_API_DECL void ev_loop_fork (EV_P) EV_NOEXCEPT; -unsigned int ev_backend (EV_P); /* backend in use by loop */ +EV_API_DECL unsigned int ev_backend (EV_P) EV_NOEXCEPT; /* backend in use by loop */ -void ev_now_update (EV_P); /* update event loop time */ +EV_API_DECL void ev_now_update (EV_P) EV_NOEXCEPT; /* update event loop time */ #if EV_WALK_ENABLE /* walk (almost) all watchers in the loop of a given type, invoking the */ /* callback on every such watcher. The callback might stop the watcher, */ /* but do nothing else with the loop */ -void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)); +EV_API_DECL void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT; #endif #endif /* prototypes */ @@ -614,45 +639,47 @@ }; #if EV_PROTOTYPES -void ev_run (EV_P_ int flags EV_CPP (= 0)); -void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)); /* break out of the loop */ +EV_API_DECL int ev_run (EV_P_ int flags EV_CPP (= 0)); +EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_NOEXCEPT; /* break out of the loop */ /* * ref/unref can be used to add or remove a refcount on the mainloop. every watcher * keeps one reference. if you have a long-running watcher you never unregister that * should not keep ev_loop from running, unref() after starting, and ref() before stopping. */ -void ev_ref (EV_P); -void ev_unref (EV_P); +EV_API_DECL void ev_ref (EV_P) EV_NOEXCEPT; +EV_API_DECL void ev_unref (EV_P) EV_NOEXCEPT; /* * convenience function, wait for a single event, without registering an event watcher * if timeout is < 0, do wait indefinitely */ -void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); +EV_API_DECL void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT; # if EV_FEATURE_API -unsigned int ev_iteration (EV_P); /* number of loop iterations */ -unsigned int ev_depth (EV_P); /* #ev_loop enters - #ev_loop leaves */ -void ev_verify (EV_P); /* abort if loop data corrupted */ +EV_API_DECL unsigned int ev_iteration (EV_P) EV_NOEXCEPT; /* number of loop iterations */ +EV_API_DECL unsigned int ev_depth (EV_P) EV_NOEXCEPT; /* #ev_loop enters - #ev_loop leaves */ +EV_API_DECL void ev_verify (EV_P) EV_NOEXCEPT; /* abort if loop data corrupted */ -void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ -void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ +EV_API_DECL void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT; /* sleep at least this time, default 0 */ +EV_API_DECL void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT; /* sleep at least this time, default 0 */ /* advanced stuff for threading etc. support, see docs */ -void ev_set_userdata (EV_P_ void *data); -void *ev_userdata (EV_P); -void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)); -void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)); +EV_API_DECL void ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT; +EV_API_DECL void *ev_userdata (EV_P) EV_NOEXCEPT; +typedef void (*ev_loop_callback)(EV_P); +EV_API_DECL void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT; +/* C++ doesn't allow the use of the ev_loop_callback typedef here, so we need to spell it out */ +EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT; -unsigned int ev_pending_count (EV_P); /* number of pending events, if any */ -void ev_invoke_pending (EV_P); /* invoke all pending watchers */ +EV_API_DECL unsigned int ev_pending_count (EV_P) EV_NOEXCEPT; /* number of pending events, if any */ +EV_API_DECL void ev_invoke_pending (EV_P); /* invoke all pending watchers */ /* * stop/start the timer handling. */ -void ev_suspend (EV_P); -void ev_resume (EV_P); +EV_API_DECL void ev_suspend (EV_P) EV_NOEXCEPT; +EV_API_DECL void ev_resume (EV_P) EV_NOEXCEPT; #endif #endif @@ -697,7 +724,8 @@ #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ -#define ev_cb(ev) (ev)->cb /* rw */ +#define ev_cb_(ev) (ev)->cb /* rw */ +#define ev_cb(ev) (memmove (&ev_cb_ (ev), &((ev_watcher *)(ev))->cb, sizeof (ev_cb_ (ev))), (ev)->cb) #if EV_MINPRI == EV_MAXPRI # define ev_priority(ev) ((ev), EV_MINPRI) @@ -710,94 +738,94 @@ #define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at) #ifndef ev_set_cb -# define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) +# define ev_set_cb(ev,cb_) (ev_cb_ (ev) = (cb_), memmove (&((ev_watcher *)(ev))->cb, &ev_cb_ (ev), sizeof (ev_cb_ (ev)))) #endif /* stopping (enabling, adding) a watcher does nothing if it is already running */ -/* stopping (disabling, deleting) a watcher does nothing unless its already running */ +/* stopping (disabling, deleting) a watcher does nothing unless it's already running */ #if EV_PROTOTYPES -/* feeds an event into a watcher as if the event actually occured */ +/* feeds an event into a watcher as if the event actually occurred */ /* accepts any ev_watcher type */ -void ev_feed_event (EV_P_ void *w, int revents); -void ev_feed_fd_event (EV_P_ int fd, int revents); +EV_API_DECL void ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT; +EV_API_DECL void ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT; #if EV_SIGNAL_ENABLE -void ev_feed_signal (int signum); -void ev_feed_signal_event (EV_P_ int signum); +EV_API_DECL void ev_feed_signal (int signum) EV_NOEXCEPT; +EV_API_DECL void ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT; #endif -void ev_invoke (EV_P_ void *w, int revents); -int ev_clear_pending (EV_P_ void *w); +EV_API_DECL void ev_invoke (EV_P_ void *w, int revents); +EV_API_DECL int ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT; -void ev_io_start (EV_P_ ev_io *w); -void ev_io_stop (EV_P_ ev_io *w); +EV_API_DECL void ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT; +EV_API_DECL void ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT; -void ev_timer_start (EV_P_ ev_timer *w); -void ev_timer_stop (EV_P_ ev_timer *w); +EV_API_DECL void ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT; +EV_API_DECL void ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT; /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ -void ev_timer_again (EV_P_ ev_timer *w); +EV_API_DECL void ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT; /* return remaining time */ -ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w); +EV_API_DECL ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT; #if EV_PERIODIC_ENABLE -void ev_periodic_start (EV_P_ ev_periodic *w); -void ev_periodic_stop (EV_P_ ev_periodic *w); -void ev_periodic_again (EV_P_ ev_periodic *w); +EV_API_DECL void ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT; +EV_API_DECL void ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT; +EV_API_DECL void ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT; #endif /* only supported in the default loop */ #if EV_SIGNAL_ENABLE -void ev_signal_start (EV_P_ ev_signal *w); -void ev_signal_stop (EV_P_ ev_signal *w); +EV_API_DECL void ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT; +EV_API_DECL void ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT; #endif /* only supported in the default loop */ # if EV_CHILD_ENABLE -void ev_child_start (EV_P_ ev_child *w); -void ev_child_stop (EV_P_ ev_child *w); +EV_API_DECL void ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT; +EV_API_DECL void ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT; # endif # if EV_STAT_ENABLE -void ev_stat_start (EV_P_ ev_stat *w); -void ev_stat_stop (EV_P_ ev_stat *w); -void ev_stat_stat (EV_P_ ev_stat *w); +EV_API_DECL void ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT; +EV_API_DECL void ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT; +EV_API_DECL void ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT; # endif # if EV_IDLE_ENABLE -void ev_idle_start (EV_P_ ev_idle *w); -void ev_idle_stop (EV_P_ ev_idle *w); +EV_API_DECL void ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT; +EV_API_DECL void ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT; # endif #if EV_PREPARE_ENABLE -void ev_prepare_start (EV_P_ ev_prepare *w); -void ev_prepare_stop (EV_P_ ev_prepare *w); +EV_API_DECL void ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT; +EV_API_DECL void ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT; #endif #if EV_CHECK_ENABLE -void ev_check_start (EV_P_ ev_check *w); -void ev_check_stop (EV_P_ ev_check *w); +EV_API_DECL void ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT; +EV_API_DECL void ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT; #endif # if EV_FORK_ENABLE -void ev_fork_start (EV_P_ ev_fork *w); -void ev_fork_stop (EV_P_ ev_fork *w); +EV_API_DECL void ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT; +EV_API_DECL void ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT; # endif # if EV_CLEANUP_ENABLE -void ev_cleanup_start (EV_P_ ev_cleanup *w); -void ev_cleanup_stop (EV_P_ ev_cleanup *w); +EV_API_DECL void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT; +EV_API_DECL void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT; # endif # if EV_EMBED_ENABLE /* only supported when loop to be embedded is in fact embeddable */ -void ev_embed_start (EV_P_ ev_embed *w); -void ev_embed_stop (EV_P_ ev_embed *w); -void ev_embed_sweep (EV_P_ ev_embed *w); +EV_API_DECL void ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT; +EV_API_DECL void ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT; +EV_API_DECL void ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT; # endif # if EV_ASYNC_ENABLE -void ev_async_start (EV_P_ ev_async *w); -void ev_async_stop (EV_P_ ev_async *w); -void ev_async_send (EV_P_ ev_async *w); +EV_API_DECL void ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT; +EV_API_DECL void ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT; +EV_API_DECL void ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT; # endif #if EV_COMPAT3