diff options
Diffstat (limited to 'thread.c')
-rw-r--r-- | thread.c | 89 |
1 files changed, 77 insertions, 12 deletions
@@ -46,6 +46,7 @@ #include "eval_intern.h" #include "gc.h" +#include "ruby/io.h" #ifndef USE_NATIVE_THREAD_PRIORITY #define USE_NATIVE_THREAD_PRIORITY 0 @@ -2618,6 +2619,8 @@ static void rb_thread_wait_fd_rw(int fd, int read) { int result = 0; + int events = read ? RB_WAITFD_IN : RB_WAITFD_OUT; + thread_debug("rb_thread_wait_fd_rw(%d, %s)\n", fd, read ? "read" : "write"); if (fd < 0) { @@ -2625,18 +2628,7 @@ rb_thread_wait_fd_rw(int fd, int read) } if (rb_thread_alone()) return; while (result <= 0) { - rb_fdset_t set; - rb_fd_init(&set); - FD_SET(fd, &set); - - if (read) { - result = do_select(fd + 1, &set, 0, 0, 0); - } - else { - result = do_select(fd + 1, 0, &set, 0, 0); - } - - rb_fd_term(&set); + result = rb_wait_for_single_fd(fd, events, NULL); if (result < 0) { rb_sys_fail(0); @@ -2712,6 +2704,79 @@ rb_thread_fd_select(int max, rb_fdset_t * read, rb_fdset_t * write, rb_fdset_t * return do_select(max, read, write, except, timeout); } +static rb_fdset_t *init_set_fd(int fd, rb_fdset_t *fds) +{ + rb_fd_init(fds); + rb_fd_set(fd, fds); + + return fds; +} + +struct select_args { + union { + int fd; + int error; + } as; + rb_fdset_t *read; + rb_fdset_t *write; + rb_fdset_t *except; + struct timeval *tv; +}; + +static VALUE +select_single(VALUE ptr) +{ + struct select_args *args = (struct select_args *)ptr; + int r; + + r = rb_thread_fd_select(args->as.fd + 1, + args->read, args->write, args->except, args->tv); + if (r == -1) + args->as.error = errno; + if (r > 0) { + r = 0; + if (args->read && rb_fd_isset(args->as.fd, args->read)) + r |= RB_WAITFD_IN; + if (args->write && rb_fd_isset(args->as.fd, args->write)) + r |= RB_WAITFD_OUT; + if (args->except && rb_fd_isset(args->as.fd, args->except)) + r |= RB_WAITFD_PRI; + } + return (VALUE)r; +} + +static VALUE +select_single_cleanup(VALUE ptr) +{ + struct select_args *args = (struct select_args *)ptr; + + if (args->read) rb_fd_term(args->read); + if (args->write) rb_fd_term(args->write); + if (args->except) rb_fd_term(args->except); + + return (VALUE)-1; +} + +int +rb_wait_for_single_fd(int fd, int events, struct timeval *tv) +{ + rb_fdset_t rfds, wfds, efds; + struct select_args args; + int r; + VALUE ptr = (VALUE)&args; + + args.as.fd = fd; + args.read = (events & RB_WAITFD_IN) ? init_set_fd(fd, &rfds) : NULL; + args.write = (events & RB_WAITFD_OUT) ? init_set_fd(fd, &wfds) : NULL; + args.except = (events & RB_WAITFD_PRI) ? init_set_fd(fd, &efds) : NULL; + args.tv = tv; + + r = (int)rb_ensure(select_single, ptr, select_single_cleanup, ptr); + if (r == -1) + errno = args.as.error; + + return r; +} /* * for GC |