* process.c: simplified because close_others option is always
  enabled by default.
  (rb_f_exec): don't need to set the option.
  (rb_exec_arg_prepare): don't need to set the option.  don't need
  default_close_others argument.
  (rb_spawn_internal): don't need to give default_close_others
  argument for rb_exec_arg_prepare.  don't need default_close_others
  argument.
  (rb_spawn_err): don't need to give default_close_others
  argument for rb_spawn_internal.
  (rb_spawn): don't need to give default_close_others
  argument for rb_spawn_internal.
  (rb_f_system): don't need to give default_close_others argument for
  rb_spawn_internal. 
  (rb_f_spawn): don't need to give default_close_others argument for
  rb_exec_arg_prepare. 



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35980 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
update async-signal-safe comments.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35981 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c (rb_exec_async_signal_safe): extracted from rb_exec_err.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35982 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
update async-signal-safe comments.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35983 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
iseq.c: fix conversion

* iseq.c (iseq_load): type is a symbol, and invalid as ID in common.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c (retry_fork): extracted from rb_fork_err.
  (send_child_error): ditto.
  (recv_child_error): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35985 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c (retry_fork): rewrite a complex "for" statement by
  simple statements. 


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35986 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
string.c: rb_str_symname_p

* string.c (rb_str_symname_p): new function that checks if the string
  is valid as a symbol name.  split from sym_inspect().


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35987 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
iseq.c: rb_id2str

* iseq.c (iseq_load, insn_operand_intern, rb_iseq_disasm)
  (rb_iseq_parameters): use rb_id2str() instead of rb_id2name() to
  keep encoding.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35988 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c (before_exec_async_signal_safe): extracted from
  before_exec.
  (before_exec_non_async_signal_safe): ditto.
  (before_exec): call before_exec_async_signal_safe and
  before_exec_non_async_signal_safe.
  (rb_exec_async_signal_safe): call before_exec_async_signal_safe.
  (rb_exec_err): call before_exec_non_async_signal_safe instead of
  before_exec.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35989 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c (rb_fork_err): rewrite a complex "if" statement.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35990 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c: don't use non async-signal-safe functions in a child
  process before exec, for invoking a command.
  (rb_exec_atfork): call rb_exec_async_signal_safe only.
  (retry_fork): take chfunc_is_async_signal_safe argument.  call
  before_fork and after_fork only unless chfunc_is_async_signal_safe.
  (send_child_error): take chfunc_is_async_signal_safe argument.
  send an exception only unless chfunc_is_async_signal_safe.
  (recv_child_error): take chfunc_is_async_signal_safe argument.
  receive an exception only unless chfunc_is_async_signal_safe.
  (rb_fork_internal): renamed from rb_fork_err and take
  chfunc_is_async_signal_safe argument.
  use rb_protect only unless chfunc_is_async_signal_safe.
  (rb_fork_err): call rb_fork_internal with false as
  chfunc_is_async_signal_safe.
  (rb_fork_async_signal_safe): call rb_fork_internal with true as
  chfunc_is_async_signal_safe.
  (rb_spawn_process): call rb_fork_async_signal_safe instead of
  rb_fork_err.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35991 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2012-06-10

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35992 b2dd03c8-39d4-4d8f-98ff-823fe69b080e