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GStaticMutex: remove ./configure checks

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Now that GMutex is exposed we can avoid the dance we did in ./configure
to allocate the correct amount of space for it within the GStaticMutex.

Remove the checks and move the definitions to gthread.h, trying very
hard to keep ABI-stable (even though we will be deprecating this soon).
This commit is contained in:
Ryan Lortie 2011-09-17 20:15:07 -04:00
parent c33cd00739
commit 4ec6d47806
2 changed files with 14 additions and 71 deletions
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63
configure.ac
View File

@ -2117,7 +2117,6 @@ CPPFLAGS="$CPPFLAGS $G_THREAD_CFLAGS"
dnl determination of G_THREAD_LIBS
dnl ******************************
mutex_has_default=no
case $have_threads in
posix)
glib_save_CPPFLAGS="$CPPFLAGS"
@ -2198,10 +2197,6 @@ case $have_threads in
fi
done
LIBS="$glib_save_LIBS"
mutex_has_default=yes
mutex_default_type='pthread_mutex_t'
mutex_default_init='PTHREAD_MUTEX_INITIALIZER'
mutex_header_file='pthread.h'
g_threads_impl="POSIX"
AC_SUBST(GTHREAD_COMPILE_IMPL_DEFINES)
CPPFLAGS="$glib_save_CPPFLAGS"
@ -2430,32 +2425,6 @@ AC_SUBST(G_THREAD_LIBS)
AC_SUBST(G_THREAD_LIBS_FOR_GTHREAD)
AC_SUBST(G_THREAD_LIBS_EXTRA)
dnl **********************************************
dnl *** GDefaultMutex setup and initialization ***
dnl **********************************************
dnl
dnl if mutex_has_default = yes, we also got
dnl mutex_default_type, mutex_default_init and mutex_header_file
if test $mutex_has_default = yes ; then
glib_save_CPPFLAGS="$CPPFLAGS"
glib_save_LIBS="$LIBS"
LIBS="$G_THREAD_LIBS $LIBS"
CPPFLAGS="$CPPFLAGS $GTHREAD_COMPILE_IMPL_DEFINES"
GLIB_SIZEOF([#include <$mutex_header_file>],
$mutex_default_type,
gmutex)
GLIB_BYTE_CONTENTS([#include <$mutex_header_file>],
$mutex_default_type,
gmutex,
$glib_cv_sizeof_gmutex,
$mutex_default_init)
if test x"$glib_cv_byte_contents_gmutex" = xno; then
mutex_has_default=no
fi
CPPFLAGS="$glib_save_CPPFLAGS"
LIBS="$glib_save_LIBS"
fi
AC_CHECK_FUNCS(clock_gettime, [], [
AC_CHECK_LIB(rt, clock_gettime, [
AC_DEFINE(HAVE_CLOCK_GETTIME, 1)
@ -3250,38 +3219,11 @@ _______EOF
#endif
_______EOF
echo >>$outfile
if test x$g_mutex_has_default = xyes; then
cat >>$outfile <<_______EOF
cat >>$outfile <<_______EOF
#define G_THREADS_ENABLED
#define G_THREADS_IMPL_$g_threads_impl_def
typedef struct _GStaticMutex GStaticMutex;
struct _GStaticMutex
{
struct _GMutex *runtime_mutex;
union {
char pad[[$g_mutex_sizeof]];
double dummy_double;
void *dummy_pointer;
long dummy_long;
} static_mutex;
};
#define G_STATIC_MUTEX_INIT { NULL, { { $g_mutex_contents} } }
#define g_static_mutex_get_mutex(mutex) \\
(g_thread_use_default_impl ? ((GMutex*)(gpointer) ((mutex)->static_mutex.pad)) : \\
g_static_mutex_get_mutex_impl_shortcut (&((mutex)->runtime_mutex)))
_______EOF
else
cat >>$outfile <<_______EOF
#define G_THREADS_ENABLED
#define G_THREADS_IMPL_$g_threads_impl_def
typedef struct _GMutex* GStaticMutex;
#define G_STATIC_MUTEX_INIT NULL
#define g_static_mutex_get_mutex(mutex) \\
(g_static_mutex_get_mutex_impl_shortcut (mutex))
_______EOF
fi
cat >>$outfile <<_______EOF
/* This represents a system thread as used by the implementation. An
@ -3670,10 +3612,7 @@ g_have_eilseq=$have_eilseq
g_threads_impl_def=$g_threads_impl
g_mutex_has_default="$mutex_has_default"
g_mutex_sizeof="$glib_cv_sizeof_gmutex"
g_system_thread_sizeof="$glib_cv_sizeof_system_thread"
g_mutex_contents="$glib_cv_byte_contents_gmutex"
g_memory_barrier_needed="$glib_memory_barrier_needed"
g_gcc_atomic_ops="$glib_cv_gcc_has_builtin_atomic_operations"

22
glib/gthread.h
View File

@ -168,10 +168,6 @@ gboolean g_thread_get_initialized (void);
/* internal function for fallback static mutex implementation */
GMutex* g_static_mutex_get_mutex_impl (GMutex **mutex);
#define g_static_mutex_get_mutex_impl_shortcut(mutex) \
(g_atomic_pointer_get (mutex) ? *(mutex) : \
g_static_mutex_get_mutex_impl (mutex))
/* shorthands for conditional and unconditional function calls */
#define G_THREAD_UF(op, arglist) \
@ -219,11 +215,19 @@ gpointer g_thread_join (GThread *thread);
void g_thread_set_priority (GThread *thread,
GThreadPriority priority);
/* GStaticMutexes can be statically initialized with the value
* G_STATIC_MUTEX_INIT, and then they can directly be used, that is
* much easier, than having to explicitly allocate the mutex before
* use
*/
#ifdef G_OS_WIN32
typedef GMutex * GStaticMutex;
#define G_STATIC_MUTEX_INIT NULL
#define g_static_mutex_get_mutex g_static_mutex_get_mutex_impl
#else /* G_OS_WIN32 */
typedef struct {
struct _GMutex *unused;
GMutex mutex;
} GStaticMutex;
#define G_STATIC_MUTEX_INIT { NULL, G_MUTEX_INIT }
#define g_static_mutex_get_mutex(s) (&(s)->mutex)
#endif /* G_OS_WIN32 */
#define g_static_mutex_lock(mutex) \
g_mutex_lock (g_static_mutex_get_mutex (mutex))
#define g_static_mutex_trylock(mutex) \