Expand and clarify thr_debug documentation.

This commit is contained in:
Hallvard Furuseth 2006-04-01 18:31:38 +00:00
parent e21ec88c88
commit 9313508035

View File

@ -18,7 +18,7 @@
/*
* libldap_r .c files should include this file after ldap_pvt_thread.h,
* with the appropriate LDAP_THREAD*_IMPLEMENTATION macro defined.
* with the appropriate LDAP_THREAD*_IMPLEMENTATION macro(s) defined.
*/
#ifndef _LDAP_PVT_THREAD_H
@ -28,19 +28,35 @@
/*
* Support for thr_debug.c:
*
* thr_debug.c defines the ldap_pvt_*() as wrappers around
* ldap_int_*(), and ldap_debug_*() around ldap_int_*().
* thr_debug.c defines ldap_pvt_thread_* as wrappers around the real
* ldap_pvt_thread_* implementation, which this file renames to
* ldap_int_thread_*.
*
* Renames ldap_pvt_thread_* names to ldap_int_thread_*, and a few
* ldap_int_*() names to ldap_debug_*(). Includes "ldap_pvt_thread.h"
* to declare these renamed functions, and undefines the macros
* afterwards when included from thr_debug.c. So,
* Implementation:
*
* libldap_r/<not thr_debug.c> define ldap_int_* instead of ldap_pvt_*.
* This file re#defines selected ldap_pvt_thread_* names to
* ldap_int_thread_*, which will be used from wrappers in thr_debug.c.
* Two ldap_int_*() calls are redirected to call ldap_debug_*(): These
* are wrappers around the originals, whose definitions are not renamed.
* This file then #includes ldap_pvt_thread.h to declare the renamed
* functions/types. If #included from thr_debug.c it finally #undefines
* the macros again.
*
* include/ldap_pvt_thread.h declares the typedefs ldap_pvt_thread*_t as
* either wrapper types ldap_debug_thread*_t or their usual definitions
* ldap_int_thread*_t, depending on the LDAP_THREAD_DEBUG_WRAP option.
* When defining the underlying implementation, this file then redirects
* the type names back to the original ldap_int_thread*_t types.
* include/ldap_<int,pvt>_thread.h also do some thr_debug magic.
*
* So,
* libldap_r/<not thr_debug.c> thus define ldap_int_thread_*() instead
* of ldap_pvt_thread_*().
* thr_debug.c defines the ldap_pvt_*() and ldap_debug_*() functions.
* In thread.c, ldap_pvt_thread_<initialize/destroy>() will call
* ldap_debug_*() instead of ldap_int_*().
* In tpool.c, ldap_int_thread_pool_shutdown() has thr_debug support
* which treats ldap_pvt_thread_pool_destroy() the same way.
* ldap_debug_thread_*() instead of ldap_int_thread_*().
* In tpool.c, ldap_int_thread_pool_shutdown() has explicit thr_debug.c
* support which treats ldap_pvt_thread_pool_destroy() the same way.
*/
#ifndef LDAP_THREAD_IMPLEMENTATION /* for first part of threads.c */