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author | Anas Nashif <anas.nashif@intel.com> | 2012-11-06 11:57:02 -0800 |
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committer | Anas Nashif <anas.nashif@intel.com> | 2012-11-06 11:57:02 -0800 |
commit | 3b35de2a90e26b99e2a6d4f61dc56d6ce7ded748 (patch) | |
tree | f66334a0ad8cf59590dd682d95d6244e8b454853 /ext/tk/README.fork | |
download | ruby-3b35de2a90e26b99e2a6d4f61dc56d6ce7ded748.tar.gz ruby-3b35de2a90e26b99e2a6d4f61dc56d6ce7ded748.tar.bz2 ruby-3b35de2a90e26b99e2a6d4f61dc56d6ce7ded748.zip |
Imported Upstream version 1.9.3.p194upstream/1.9.3.p194
Diffstat (limited to 'ext/tk/README.fork')
-rw-r--r-- | ext/tk/README.fork | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/ext/tk/README.fork b/ext/tk/README.fork new file mode 100644 index 0000000..c58d758 --- /dev/null +++ b/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 |