想看源碼，宏太多，看著累，宏展開，再看，功力時間不夠，先放下

放上宏展開后的代碼。

libev4.20

展開方示為

./configure

修改makefile文件，字符串?替換CC為 CPP

注意要把基礎的CC定義保留

make

mv ev.o ev.c

mv event.o event.c

make clean

?

修改makefile文件，字符串替換CPP-》CC

注意要把基礎的CPP定義保留?

?

宏展開后#號注釋的代碼，可以修改CPP的定義 加個參數?

?

ev.c,event.c

及為展開后的代碼

測試可編譯通過

附ev.c部分代碼

struct ev_loop; enum {EV_UNDEF = (int)0xFFFFFFFF,EV_NONE = 0x00,EV_READ = 0x01,EV_WRITE = 0x02,EV__IOFDSET = 0x80,EV_IO = EV_READ,EV_TIMER = 0x00000100,EV_TIMEOUT = EV_TIMER,EV_PERIODIC = 0x00000200,EV_SIGNAL = 0x00000400,EV_CHILD = 0x00000800,EV_STAT = 0x00001000,EV_IDLE = 0x00002000,EV_PREPARE = 0x00004000,EV_CHECK = 0x00008000,EV_EMBED = 0x00010000,EV_FORK = 0x00020000,EV_CLEANUP = 0x00040000,EV_ASYNC = 0x00080000,EV_CUSTOM = 0x01000000,EV_ERROR = (int)0x80000000 }; typedef struct ev_watcher {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_watcher *w, int revents); } ev_watcher;typedef struct ev_watcher_list {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_watcher_list *w, int revents);struct ev_watcher_list *next; } ev_watcher_list;typedef struct ev_watcher_time {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_watcher_time *w, int revents);ev_tstamp at; } ev_watcher_time;typedef struct ev_io {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_io *w, int revents);struct ev_watcher_list *next;int fd;int events; } ev_io;typedef struct ev_timer {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_timer *w, int revents);ev_tstamp at;ev_tstamp repeat; } ev_timer;typedef struct ev_periodic {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_periodic *w, int revents); ev_tstamp at;ev_tstamp offset;ev_tstamp interval;ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) ; } ev_periodic;typedef struct ev_signal {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_signal *w, int revents);struct ev_watcher_list *next;int signum; } ev_signal;typedef struct ev_child {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_child *w, int revents);struct ev_watcher_list *next;int flags;int pid;int rpid;int rstatus; } ev_child;typedef struct stat ev_statdata;typedef struct ev_stat {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_stat *w, int revents);struct ev_watcher_list *next;ev_timer timer;ev_tstamp interval;const char *path;ev_statdata prev;ev_statdata attr;int wd; } ev_stat;typedef struct ev_idle {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_idle *w, int revents); } ev_idle;typedef struct ev_prepare {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_prepare *w, int revents); } ev_prepare;typedef struct ev_check {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_check *w, int revents); } ev_check;typedef struct ev_fork {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_fork *w, int revents); } ev_fork;typedef struct ev_cleanup {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_cleanup *w, int revents); } ev_cleanup;typedef struct ev_embed {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_embed *w, int revents);struct ev_loop *other;ev_io io;ev_prepare prepare;ev_check check;ev_timer timer;ev_periodic periodic;ev_idle idle;ev_fork fork;ev_cleanup cleanup;} ev_embed;typedef struct ev_async {int active; int pending; int priority; void *data; void (*cb)(struct ev_loop *loop, struct ev_async *w, int revents);sig_atomic_t volatile sent; } ev_async;union ev_any_watcher {struct ev_watcher w;struct ev_watcher_list wl;struct ev_io io;struct ev_timer timer;struct ev_periodic periodic;struct ev_signal signal;struct ev_child child;struct ev_stat stat;struct ev_idle idle;struct ev_prepare prepare;struct ev_check check;struct ev_fork fork;struct ev_cleanup cleanup;struct ev_embed embed;struct ev_async async;};enum {EVFLAG_AUTO = 0x00000000U,EVFLAG_NOENV = 0x01000000U,EVFLAG_FORKCHECK = 0x02000000U,EVFLAG_NOINOTIFY = 0x00100000U,EVFLAG_NOSIGFD = 0,EVFLAG_SIGNALFD = 0x00200000U,EVFLAG_NOSIGMASK = 0x00400000U };enum {EVBACKEND_SELECT = 0x00000001U,EVBACKEND_POLL = 0x00000002U,EVBACKEND_EPOLL = 0x00000004U,EVBACKEND_KQUEUE = 0x00000008U,EVBACKEND_DEVPOLL = 0x00000010U,EVBACKEND_PORT = 0x00000020U,EVBACKEND_ALL = 0x0000003FU,EVBACKEND_MASK = 0x0000FFFFU };extern int ev_version_major (void) ; extern int ev_version_minor (void) ;extern unsigned int ev_supported_backends (void) ; extern unsigned int ev_recommended_backends (void) ; extern unsigned int ev_embeddable_backends (void) ;extern ev_tstamp ev_time (void) ; extern void ev_sleep (ev_tstamp delay) ;extern void ev_set_allocator (void *(*cb)(void *ptr, long size) ) ;extern void ev_set_syserr_cb (void (*cb)(const char *msg) ) ;extern struct ev_loop *ev_default_loop (unsigned int flags ) ;static inline struct ev_loop * ev_default_loop_uc_ (void) {extern struct ev_loop *ev_default_loop_ptr;return ev_default_loop_ptr; }static inline int ev_is_default_loop (struct ev_loop *loop) {return loop == ev_default_loop_uc_ (); }extern struct ev_loop *ev_loop_new (unsigned int flags ) ;static inline void idle_reify (struct ev_loop *loop) {if (__builtin_expect ((!!(((loop)->idleall))),(0))){int pri;for (pri = ((((0x7f) & 4) ? +2 : 0) - (((0x7f) & 4) ? -2 : 0) + 1); pri--; ){if (((loop)->pendingcnt) [pri])break;if (((loop)->idlecnt) [pri]){queue_events (loop, (W *)((loop)->idles) [pri], ((loop)->idlecnt) [pri], EV_IDLE);break;}}} }static inline void timers_reify (struct ev_loop *loop) {do { } while (0);if (((loop)->timercnt) && (((loop)->timers) [(4 - 1)]).at < ((loop)->mn_now)){do{ev_timer *w = (ev_timer *)(((loop)->timers) [(4 - 1)]).w;if (w->repeat){((WT)(w))->at += w->repeat;if (((WT)(w))->at < ((loop)->mn_now))((WT)(w))->at = ((loop)->mn_now);(__builtin_expect(!(("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)), 0) ? __assert_rtn(__func__, "ev.c", 3207, "(\"libev: negative ev_timer repeat value found while processing timers\", w->repeat > 0.)") : (void)0);(((loop)->timers) [(4 - 1)]).at = (((loop)->timers) [(4 - 1)]).w->at;downheap (((loop)->timers), ((loop)->timercnt), (4 - 1));}elseev_timer_stop (loop, w);do { } while (0);feed_reverse (loop, (W)w);}while (((loop)->timercnt) && (((loop)->timers) [(4 - 1)]).at < ((loop)->mn_now));feed_reverse_done (loop, EV_TIMER);} }static void __attribute__ ((__noinline__)) periodic_recalc (struct ev_loop *loop, ev_periodic *w) {ev_tstamp interval = w->interval > 0.0001220703125 ? w->interval : 0.0001220703125;ev_tstamp at = w->offset + interval * floor ((((loop)->ev_rt_now) - w->offset) / interval);while (at <= ((loop)->ev_rt_now)){ev_tstamp nat = at + w->interval;if (__builtin_expect ((!!(nat == at)),(0))){at = ((loop)->ev_rt_now);break;}at = nat;}((WT)(w))->at = at; }static inline void periodics_reify (struct ev_loop *loop) {do { } while (0);while (((loop)->periodiccnt) && (((loop)->periodics) [(4 - 1)]).at < ((loop)->ev_rt_now)){do{ev_periodic *w = (ev_periodic *)(((loop)->periodics) [(4 - 1)]).w;if (w->reschedule_cb){((WT)(w))->at = w->reschedule_cb (w, ((loop)->ev_rt_now));(__builtin_expect(!(("libev: ev_periodic reschedule callback returned time in the past", ((WT)(w))->at >= ((loop)->ev_rt_now))), 0) ? __assert_rtn(__func__, "ev.c", 3269, "(\"libev: ev_periodic reschedule callback returned time in the past\", ev_at (w) >= ev_rt_now)") : (void)0);(((loop)->periodics) [(4 - 1)]).at = (((loop)->periodics) [(4 - 1)]).w->at;downheap (((loop)->periodics), ((loop)->periodiccnt), (4 - 1));}else if (w->interval){periodic_recalc (loop, w);(((loop)->periodics) [(4 - 1)]).at = (((loop)->periodics) [(4 - 1)]).w->at;downheap (((loop)->periodics), ((loop)->periodiccnt), (4 - 1));}elseev_periodic_stop (loop, w);do { } while (0);feed_reverse (loop, (W)w);}while (((loop)->periodiccnt) && (((loop)->periodics) [(4 - 1)]).at < ((loop)->ev_rt_now));feed_reverse_done (loop, EV_PERIODIC);} }static void __attribute__ ((__noinline__)) periodics_reschedule (struct ev_loop *loop) {int i;for (i = (4 - 1); i < ((loop)->periodiccnt) + (4 - 1); ++i){ev_periodic *w = (ev_periodic *)(((loop)->periodics) [i]).w;if (w->reschedule_cb)((WT)(w))->at = w->reschedule_cb (w, ((loop)->ev_rt_now));else if (w->interval)periodic_recalc (loop, w);(((loop)->periodics) [i]).at = (((loop)->periodics) [i]).w->at;}reheap (((loop)->periodics), ((loop)->periodiccnt)); }static void __attribute__ ((__noinline__)) timers_reschedule (struct ev_loop *loop, ev_tstamp adjust) {int i;for (i = 0; i < ((loop)->timercnt); ++i){ANHE *he = ((loop)->timers) + i + (4 - 1);(*he).w->at += adjust;(*he).at = (*he).w->at;} }static inline void time_update (struct ev_loop *loop, ev_tstamp max_block) {{((loop)->ev_rt_now) = ev_time ();if (__builtin_expect ((!!(((loop)->mn_now) > ((loop)->ev_rt_now) || ((loop)->ev_rt_now) > ((loop)->mn_now) + max_block + 1.)),(0))){timers_reschedule (loop, ((loop)->ev_rt_now) - ((loop)->mn_now));periodics_reschedule (loop);}((loop)->mn_now) = ((loop)->ev_rt_now);} } View Code

還沒看，以后可能也不會看了

轉載于:https://www.cnblogs.com/zihunqingxin/p/5027350.html

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