diff options
| -rw-r--r-- | Changes | 1 | ||||
| -rw-r--r-- | ev.3 | 48 | ||||
| -rw-r--r-- | ev.c | 2 |
3 files changed, 43 insertions, 8 deletions
@@ -22,6 +22,7 @@ TODO: assert on fd watcher linked list pointing to itself - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber). - work around some kernels losing file descriptors by leaking the kqueue descriptor in the child. + - include sys/syscall.h instead of plain syscall.h. 4.11 Sat Feb 4 19:52:39 CET 2012 - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as @@ -124,7 +124,7 @@ .\" ======================================================================== .\" .IX Title "LIBEV 3" -.TH LIBEV 3 "2012-04-03" "libev-4.11" "libev - high performance full featured event loop" +.TH LIBEV 3 "2012-04-19" "libev-4.11" "libev - high performance full featured event loop" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l @@ -369,8 +369,8 @@ the current system, you would need to look at \f(CW\*(C`ev_embeddable_backends ( & ev_supported_backends ()\*(C'\fR, likewise for recommended ones. .Sp See the description of \f(CW\*(C`ev_embed\*(C'\fR watchers for more info. -.IP "ev_set_allocator (void *(*cb)(void *ptr, long size))" 4 -.IX Item "ev_set_allocator (void *(*cb)(void *ptr, long size))" +.IP "ev_set_allocator (void *(*cb)(void *ptr, long size) throw ())" 4 +.IX Item "ev_set_allocator (void *(*cb)(void *ptr, long size) throw ())" Sets the allocation function to use (the prototype is similar \- the semantics are identical to the \f(CW\*(C`realloc\*(C'\fR C89/SuS/POSIX function). It is used to allocate and free memory (no surprises here). If it returns zero @@ -406,8 +406,8 @@ retries (example requires a standards-compliant \f(CW\*(C`realloc\*(C'\fR). \& ... \& ev_set_allocator (persistent_realloc); .Ve -.IP "ev_set_syserr_cb (void (*cb)(const char *msg))" 4 -.IX Item "ev_set_syserr_cb (void (*cb)(const char *msg))" +.IP "ev_set_syserr_cb (void (*cb)(const char *msg) throw ())" 4 +.IX Item "ev_set_syserr_cb (void (*cb)(const char *msg) throw ())" Set the callback function to call on a retryable system call error (such as failed select, poll, epoll_wait). The message is a printable string indicating the system call or subsystem causing the problem. If this @@ -1142,8 +1142,8 @@ invoke the actual watchers inside another context (another thread etc.). .Sp If you want to reset the callback, use \f(CW\*(C`ev_invoke_pending\*(C'\fR as new callback. -.IP "ev_set_loop_release_cb (loop, void (*release)(\s-1EV_P\s0), void (*acquire)(\s-1EV_P\s0))" 4 -.IX Item "ev_set_loop_release_cb (loop, void (*release)(EV_P), void (*acquire)(EV_P))" +.IP "ev_set_loop_release_cb (loop, void (*release)(\s-1EV_P\s0) throw (), void (*acquire)(\s-1EV_P\s0) throw ())" 4 +.IX Item "ev_set_loop_release_cb (loop, void (*release)(EV_P) throw (), void (*acquire)(EV_P) throw ())" Sometimes you want to share the same loop between multiple threads. This can be done relatively simply by putting mutex_lock/unlock calls around each call to a libev function. @@ -4036,6 +4036,40 @@ The libev emulation is \fInot\fR \s-1ABI\s0 compatible to libevent, you need to use the libev header file and library. .SH "\*(C+ SUPPORT" .IX Header " SUPPORT" +.SS "C \s-1API\s0" +.IX Subsection "C API" +The normal C \s-1API\s0 should work fine when used from \*(C+: both ev.h and the +libev sources can be compiled as \*(C+. Therefore, code that uses the C \s-1API\s0 +will work fine. +.PP +Proper exception specifications might have to be added to callbacks passed +to libev: exceptions may be thrown only from watcher callbacks, all +other callbacks (allocator, syserr, loop acquire/release and periodioc +reschedule callbacks) must not throw exceptions, and might need a \f(CW\*(C`throw +()\*(C'\fR specification. If you have code that needs to be compiled as both C +and \*(C+ you can use the \f(CW\*(C`EV_THROW\*(C'\fR macro for this: +.PP +.Vb 6 +\& static void +\& fatal_error (const char *msg) EV_THROW +\& { +\& perror (msg); +\& abort (); +\& } +\& +\& ... +\& ev_set_syserr_cb (fatal_error); +.Ve +.PP +The only \s-1API\s0 functions that can currently throw exceptions are \f(CW\*(C`ev_run\*(C'\fR, +\&\f(CW\*(C`ev_inoke\*(C'\fR, \f(CW\*(C`ev_invoke_pending\*(C'\fR and \f(CW\*(C`ev_loop_destroy\*(C'\fR (the latter +because it runs cleanup watchers). +.PP +Throwing exceptions in watcher callbacks is only supported if libev itself +is compiled with a \*(C+ compiler or your C and \*(C+ environments allow +throwing exceptions through C libraries (most do). +.SS "\*(C+ \s-1API\s0" +.IX Subsection " API" Libev comes with some simplistic wrapper classes for \*(C+ that mainly allow you to use some convenience methods to start/stop watchers and also change the callback model to a model using method callbacks on objects. @@ -361,7 +361,7 @@ /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ /* which makes programs even slower. might work on other unices, too. */ #if EV_USE_CLOCK_SYSCALL -# include <syscall.h> +# include <sys/syscall.h> # ifdef SYS_clock_gettime # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) # undef EV_USE_MONOTONIC |