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author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
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committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/ext/tk/README.fork |
Fresh start
Diffstat (limited to 'jni/ruby/ext/tk/README.fork')
-rw-r--r-- | jni/ruby/ext/tk/README.fork | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/jni/ruby/ext/tk/README.fork b/jni/ruby/ext/tk/README.fork new file mode 100644 index 0000000..c58d758 --- /dev/null +++ b/jni/ruby/ext/tk/README.fork @@ -0,0 +1,34 @@ +Ruby/Tk does NOT support forking the process on which Tk interpreter +is running (unless NEVER control Tk interpreter under the forked child +process). In the library 'tk.rb', a Tk interpreter is initialized. +Therefore, if you want running Tk under a child process, please call +"require 'tk'" in the child process. + +# If do fork and exec(<new Ruby/Tk>) on the child process, you can +# control Ruby/Tk interpreter on the child process by 'send' command +# of Tcl/Tk. About this, please see Tk.appsend and Tk.rb_appsend, or +# 'remote-tk.rb' and the sample 'sample/remote-ip_sample.rb'. + +For example, the following sample1 will NOT work, and sample2 will +work properly. + +---<sample1: NOT work>--------------------------------------- +require 'tk' ## init Tk interpreter under parent process + +exit! if fork ## exit parent process + +## child process +TkButton.new(:text=>'QUIT', :command=>proc{exit}).pack +Tk.mainloop +------------------------------------------------------------- + +---<sample2: will work>-------------------------------------- +exit! if fork ## exit main process + +## child process +require 'tk' ## init Tk interpreter under child process +TkButton.new(:text=>'QUIT', :command=>proc{exit}).pack +Tk.mainloop +------------------------------------------------------------- + + 2004/05/22 Hidetoshi NAGAI |