Feature #4464 » 0001-add-Fcntl-Flock-object-for-easier-use-of-POSIX-file-.patch
| ext/fcntl/extconf.rb | ||
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require 'mkmf'
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have_type('struct flock', %w(unistd.h fcntl.h))
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create_makefile('fcntl')
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| ext/fcntl/fcntl.c | ||
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#include "ruby.h"
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#include <fcntl.h>
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static void Init_FcntlFlock(VALUE);
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/* Fcntl loads the constants defined in the system's <fcntl.h> C header
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* file, and used with both the fcntl(2) and open(2) POSIX system calls.
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| ... | ... | |
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Init_fcntl()
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{
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VALUE mFcntl = rb_define_module("Fcntl");
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Init_FcntlFlock(mFcntl);
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#ifdef F_DUPFD
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rb_define_const(mFcntl, "F_DUPFD", INT2NUM(F_DUPFD));
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#endif
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| ... | ... | |
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rb_define_const(mFcntl, "O_ACCMODE", INT2FIX(O_RDONLY | O_WRONLY | O_RDWR));
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#endif
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}
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#ifdef HAVE_TYPE_STRUCT_FLOCK
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static short
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num2short(VALUE val)
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{
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int i = NUM2INT(val);
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if (i != (short)i) {
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const char *s = i > 0 ? "big" : "small";
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rb_raise(rb_eRangeError, "Integer %d too %s to for `short'", i, s);
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}
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return (short)i;
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}
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static struct flock *
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flock_ptr(VALUE self)
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{
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if (RSTRING_LEN(self) < sizeof(struct flock))
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rb_raise(rb_eRuntimeError, "flock buffer shortened");
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rb_str_modify(self);
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return (struct flock *)RSTRING_PTR(self);
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}
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static VALUE
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flock_init(int argc, VALUE *argv, VALUE self)
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{
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struct flock *flock;
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VALUE type, whence, start, len;
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rb_str_resize(self, sizeof(struct flock));
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flock = flock_ptr(self);
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rb_scan_args(argc, argv, "04", &type, &whence, &start, &len);
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flock->l_type = NIL_P(type) ? F_RDLCK : num2short(type);
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flock->l_whence = NIL_P(whence) ? SEEK_SET : num2short(whence);
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flock->l_start = NIL_P(start) ? 0 : NUM2OFFT(start);
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flock->l_len = NIL_P(len) ? 0 : NUM2OFFT(len);
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flock->l_pid = (pid_t)-1;
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return self;
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}
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static VALUE
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l_type(VALUE self)
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{
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return INT2NUM(flock_ptr(self)->l_type);
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}
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static VALUE
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set_l_type(VALUE self, VALUE val)
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{
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flock_ptr(self)->l_type = num2short(val);
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return val;
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}
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static VALUE
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l_whence(VALUE self)
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{
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return INT2NUM(flock_ptr(self)->l_whence);
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}
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static VALUE
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set_l_whence(VALUE self, VALUE val)
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{
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flock_ptr(self)->l_whence = num2short(val);
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return val;
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}
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static VALUE
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l_start(VALUE self)
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{
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return OFFT2NUM(flock_ptr(self)->l_start);
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}
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static VALUE
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set_l_start(VALUE self, VALUE val)
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{
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flock_ptr(self)->l_start = NUM2OFFT(val);
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return val;
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}
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static VALUE
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l_len(VALUE self)
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{
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return OFFT2NUM(flock_ptr(self)->l_len);
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}
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static VALUE
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set_l_len(VALUE self, VALUE val)
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{
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flock_ptr(self)->l_len = NUM2OFFT(val);
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return val;
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}
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static VALUE
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l_pid(VALUE self)
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{
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return PIDT2NUM(flock_ptr(self)->l_pid);
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}
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static VALUE
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flock_inspect(VALUE self)
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{
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struct flock *flock = flock_ptr(self);
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const char fmt[] = "#<%s: type=%s, whence=%s, start=%lld, len=%lld, pid=%ld>";
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const char *name = rb_obj_classname(self);
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const char *type, *whence;
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switch (flock->l_type) {
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case F_RDLCK: type = "Fcntl::F_RDLCK"; break;
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case F_WRLCK: type = "Fcntl::F_WRLCK"; break;
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case F_UNLCK: type = "Fcntl::F_UNLCK"; break;
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default: type = "(unknown)";
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}
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switch (flock->l_whence) {
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case SEEK_SET: whence = "IO::SEEK_SET"; break;
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case SEEK_CUR: whence = "IO::SEEK_CUR"; break;
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case SEEK_END: whence = "IO::SEEK_END"; break;
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default: whence = "(unknown)";
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}
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return rb_sprintf(fmt, name, type, whence,
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(unsigned long long)flock->l_start,
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(unsigned long long)flock->l_len,
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(long)flock->l_pid);
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}
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static void
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Init_FcntlFlock(VALUE mFcntl)
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{
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VALUE cFcntlFlock = rb_define_class_under(mFcntl, "Flock", rb_cString);
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rb_define_private_method(cFcntlFlock, "initialize", flock_init, -1);
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rb_define_method(cFcntlFlock, "type", l_type, 0);
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rb_define_method(cFcntlFlock, "type=", set_l_type, 1);
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rb_define_method(cFcntlFlock, "whence", l_whence, 0);
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rb_define_method(cFcntlFlock, "whence=", set_l_whence, 1);
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rb_define_method(cFcntlFlock, "start", l_start, 0);
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rb_define_method(cFcntlFlock, "start=", set_l_start, 1);
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rb_define_method(cFcntlFlock, "len", l_len, 0);
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rb_define_method(cFcntlFlock, "len=", set_l_len, 1);
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rb_define_method(cFcntlFlock, "pid", l_pid, 0);
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rb_define_method(cFcntlFlock, "inspect", flock_inspect, 0);
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}
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#else /* ! HAVE_TYPE_STRUCT_FLOCK */
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static void Init_FcntlFlock(VALUE mFcntl) { }
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#endif /* HAVE_TYPE_STRUCT_FLOCK */
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| test/fcntl/test_fcntl_flock.rb | ||
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require "test/unit"
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begin
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require "fcntl"
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rescue LoadError
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end
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require "tempfile"
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class TestFcntlFlock < Test::Unit::TestCase
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def test_initialize_noargs
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flock = Fcntl::Flock.new
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assert_equal Fcntl::F_RDLCK, flock.type
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assert_equal IO::SEEK_SET, flock.whence
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assert_equal 0, flock.start
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assert_equal 0, flock.len
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end
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def test_inspect
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expect = "#<Fcntl::Flock: type=Fcntl::F_RDLCK, whence=IO::SEEK_SET, " \
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"start=0, len=0, pid=-1>"
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assert_equal expect, Fcntl::Flock.new.inspect
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end
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def test_initialize_write_lock
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flock = Fcntl::Flock.new Fcntl::F_WRLCK
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assert_equal Fcntl::F_WRLCK, flock.type
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assert_equal IO::SEEK_SET, flock.whence
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assert_equal 0, flock.start
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assert_equal 0, flock.len
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end
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def test_accessors
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flock = Fcntl::Flock.new
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assert_kind_of Integer, flock.pid
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flock.type = Fcntl::F_UNLCK
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assert_equal Fcntl::F_UNLCK, flock.type
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flock.whence = IO::SEEK_CUR
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assert_equal IO::SEEK_CUR, flock.whence
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flock.len = 2
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assert_equal 2, flock.len
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flock.start = 3
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assert_equal 3, flock.start
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end
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def test_get_lock
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lock = Fcntl::Flock.new Fcntl::F_WRLCK
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pid = nil
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Tempfile.open(self.class.name) do |tmp|
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r, w = IO.pipe
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pid = fork do
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File.open(tmp.path, "wb") do |fp|
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fp.fcntl Fcntl::F_SETLKW, lock
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r.close
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w.syswrite "."
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sleep
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end
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end
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w.close
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assert_equal ".", r.read(1)
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r.close
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tmp.fcntl Fcntl::F_GETLK, lock
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end
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assert_equal pid, lock.pid
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Process.kill :TERM, pid
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Process.waitpid2(pid)
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end
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end if defined? Fcntl::Flock
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