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author | Mark H Weaver <mhw@netris.org> | 2013-02-28 17:56:58 -0500 |
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committer | Mark H Weaver <mhw@netris.org> | 2013-03-05 16:04:55 -0500 |
commit | f57ea23ac8e1436f37ceeda3ea8625243c20e645 (patch) | |
tree | 9770b54992f625abae89964d8b6efea62d09dea6 /doc/ref | |
parent | 29ace173b170a5d77e6becb30fb1d9f253a373d5 (diff) | |
download | guile-f57ea23ac8e1436f37ceeda3ea8625243c20e645.tar.gz |
Fix thread-unsafe lazy initializations.
* libguile/debug.c (scm_local_eval):
libguile/ports.c (scm_current_warning_port):
libguile/strports.c (scm_eval_string_in_module): Perform
lazy-initialization while holding a mutex. Use SCM_UNDEFINED as the
uninitialized value. Use 'scm_c_*_variable'.
* doc/ref/api-modules.texi (Accessing Modules from C): Fix
'my_eval_string' example to be thread-safe.
Diffstat (limited to 'doc/ref')
-rw-r--r-- | doc/ref/api-modules.texi | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/doc/ref/api-modules.texi b/doc/ref/api-modules.texi index b9befc00c..47b81601b 100644 --- a/doc/ref/api-modules.texi +++ b/doc/ref/api-modules.texi @@ -945,14 +945,18 @@ the @var{name} is not bound in the module, signals an error. Returns a variable, always. @example -SCM my_eval_string (SCM str) -@{ - static SCM eval_string_var = SCM_BOOL_F; +static SCM eval_string_var; - if (scm_is_false (eval_string_var)) - eval_string_var = - scm_c_public_lookup ("ice-9 eval-string", "eval-string"); +/* NOTE: It is important that the call to 'my_init' + happens-before all calls to 'my_eval_string'. */ +void my_init (void) +@{ + eval_string_var = scm_c_public_lookup ("ice-9 eval-string", + "eval-string"); +@} +SCM my_eval_string (SCM str) +@{ return scm_call_1 (scm_variable_ref (eval_string_var), str); @} @end example |