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document my understanding of why the pipe_of_death_mutex is a Good Thing
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88967 13f79535-47bb-0310-9956-ffa450edef68
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@@ -129,7 +129,8 @@ char ap_coredump_dir[MAX_STRING_LEN];
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static apr_file_t *pipe_of_death_in = NULL;
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static apr_file_t *pipe_of_death_out = NULL;
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static apr_lock_t *pipe_of_death_mutex;
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static apr_lock_t *pipe_of_death_mutex; /* insures that a child process only
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consumes one character */
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/* *Non*-shared http_main globals... */
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