Added support for library initialization and finalization, and verification

that the initializer completed successfully.  Delay initialization on POSIX
until the first "verification" call.  Currently specific to a few platforms,
but should still build on others without thread support enabled.

Use it to finish creating (if necessary) and destroy mutexes, and free some
other storage "permanently" allocated by libraries (currently, libkrb5
cache/keytab type registries only).  Change initialization of static mutexes to
a two-step operation, a static "partial" initializer and a "finish_init"
routine called from a thread-safe environment like library initialization is
assumed to be.  POSIX will use the former, Windows will use the latter, and the
debug support will check that *both* have been used.

Added init/fini functions to com_err, profile, krb5, and gssapi libraries.
(The profile library one may need to be removed later.)  The existing ones, not
thread-safe, are still around.

Use weak symbol support if available to figure out if the pthread library has
been linked in, and avoid calling certain routines if the C library stubs are
known not to exist or work.

Stub declarations for thread-specific data.
Minor bugfixes, whitespace changes.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@16268 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 43 insertions, 0 deletions

diff --git a/src/include/ChangeLog b/src/include/ChangeLog
index cb87feb7a..279990cb3 100644
--- a/src/include/ChangeLog
+++ b/src/include/ChangeLog
@@ -1,3 +1,46 @@
+2004-04-24  Ken Raeburn  <raeburn@mit.edu>
+
+	* k5-platform.h (DELAY_INITIALIZER): New macro, defined always.
+	(CONSTRUCTOR_ATTR_WORKS, DESTRUCTOR_ATTR_WORKS): New macro,
+	defined for Linux and NetBSD, and Solaris with gcc.
+	(USE_LINKER_FINI_OPTION): New macro, defined on IRIX, and on
+	Solaris with native compiler.
+	(JOIN2, JOIN2_2, JOIN3, JOIN3_2, JOIN4, JOIN4_2): New utility
+	macros.
+	(k5_init_t): New typedef, for some platforms.
+	(MAKE_INIT_FUNCTION, MAKE_FINI_FUNCTION, CALL_INIT_FUNCTION,
+	INITIALIZER_RAN, PROGRAM_EXITING): New macros for library
+	initialization and finalization support.
+
+	* k5-thread.h: Use k5_mutex_init instead of K5_MUTEX_INITIALIZER
+	for multiple-inclusion protection.
+	(K5_MUTEX_DEBUG_INITIALIZER): Change initial initialized flag to
+	2.
+	(k5_mutex_debug_finish_init): New macro, verifies value 2 and
+	changes it to 1.
+	(k5_mutex_debug_lock): Test various values of initialized and
+	locked flags separately, so assertion failure message is more
+	immediately informative.
+	(K5_MUTEX_PARTIAL_INITIALIZER): Rename from K5_MUTEX_INITIALIZER.
+	(k5_mutex_finish_init): New macro.
+	(pthread_once, pthread_mutexattr_setrobust_np): Consider
+	declaring weak based on availability.
+	(K5_PTHREADS_LOADED): New macro, tests to see if pthread
+	functions are available, if weak references are supported.
+	(k5_mutex_lock, k5_mutex_unlock): On IRIX, redefine to bypass
+	pthread code if pthread library isn't loaded.
+	(k5_once_t): New typedef.
+	(K5_ONCE_INIT, k5_once): New macros.
+
+	* Makefile.in (autoconf.stmp): Depend on aclocal.m4.
+
+	* k5-platform.h: Include limits.h before testing for SIZE_MAX.
+
+	* k5-thread.h (k5_key_t): New enumerator typedef.
+	(k5_key_register, k5_getspecific, k5_setspecific): New macros.
+	(krb5int_key_register, krb5int_getspecific, krb5int_setspecific,
+	krb5int_key_delete): Declare.
+
 2004-04-16  Sam Hartman  <hartmans@mit.edu>
 
 	* k5-int.h: krb5int_populate_gic_opt now takes credentials  so it