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8681dffa91
The next commit will use it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
238 lines
8.0 KiB
C
238 lines
8.0 KiB
C
/*
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* GLIB Compatibility Functions
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*
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* Copyright IBM, Corp. 2013
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Michael Tokarev <mjt@tls.msk.ru>
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* Paolo Bonzini <pbonzini@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_GLIB_COMPAT_H
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#define QEMU_GLIB_COMPAT_H
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#include <glib.h>
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/* GLIB version compatibility flags */
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#if !GLIB_CHECK_VERSION(2, 26, 0)
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#define G_TIME_SPAN_SECOND (G_GINT64_CONSTANT(1000000))
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#endif
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#if !GLIB_CHECK_VERSION(2, 28, 0)
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static inline gint64 qemu_g_get_monotonic_time(void)
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{
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/* g_get_monotonic_time() is best-effort so we can use the wall clock as a
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* fallback.
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*/
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GTimeVal time;
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g_get_current_time(&time);
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return time.tv_sec * G_TIME_SPAN_SECOND + time.tv_usec;
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}
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/* work around distro backports of this interface */
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#define g_get_monotonic_time() qemu_g_get_monotonic_time()
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#endif
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#ifdef _WIN32
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/*
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* g_poll has a problem on Windows when using
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* timeouts < 10ms, so use wrapper.
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*/
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#define g_poll(fds, nfds, timeout) g_poll_fixed(fds, nfds, timeout)
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gint g_poll_fixed(GPollFD *fds, guint nfds, gint timeout);
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#endif
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#if !GLIB_CHECK_VERSION(2, 31, 0)
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/* before glib-2.31, GMutex and GCond was dynamic-only (there was a separate
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* GStaticMutex, but it didn't work with condition variables).
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*
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* Our implementation uses GOnce to fake a static implementation that does
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* not require separate initialization.
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* We need to rename the types to avoid passing our CompatGMutex/CompatGCond
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* by mistake to a function that expects GMutex/GCond. However, for ease
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* of use we keep the GLib function names. GLib uses macros for the
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* implementation, we use inline functions instead and undefine the macros.
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*/
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typedef struct CompatGMutex {
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GOnce once;
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} CompatGMutex;
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typedef struct CompatGCond {
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GOnce once;
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} CompatGCond;
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static inline gpointer do_g_mutex_new(gpointer unused)
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{
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return (gpointer) g_mutex_new();
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}
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static inline void g_mutex_init(CompatGMutex *mutex)
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{
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mutex->once = (GOnce) G_ONCE_INIT;
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}
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static inline void g_mutex_clear(CompatGMutex *mutex)
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{
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g_assert(mutex->once.status != G_ONCE_STATUS_PROGRESS);
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if (mutex->once.retval) {
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g_mutex_free((GMutex *) mutex->once.retval);
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}
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mutex->once = (GOnce) G_ONCE_INIT;
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}
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static inline void (g_mutex_lock)(CompatGMutex *mutex)
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{
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g_once(&mutex->once, do_g_mutex_new, NULL);
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g_mutex_lock((GMutex *) mutex->once.retval);
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}
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#undef g_mutex_lock
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static inline gboolean (g_mutex_trylock)(CompatGMutex *mutex)
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{
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g_once(&mutex->once, do_g_mutex_new, NULL);
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return g_mutex_trylock((GMutex *) mutex->once.retval);
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}
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#undef g_mutex_trylock
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static inline void (g_mutex_unlock)(CompatGMutex *mutex)
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{
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g_mutex_unlock((GMutex *) mutex->once.retval);
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}
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#undef g_mutex_unlock
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static inline gpointer do_g_cond_new(gpointer unused)
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{
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return (gpointer) g_cond_new();
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}
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static inline void g_cond_init(CompatGCond *cond)
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{
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cond->once = (GOnce) G_ONCE_INIT;
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}
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static inline void g_cond_clear(CompatGCond *cond)
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{
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g_assert(cond->once.status != G_ONCE_STATUS_PROGRESS);
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if (cond->once.retval) {
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g_cond_free((GCond *) cond->once.retval);
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}
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cond->once = (GOnce) G_ONCE_INIT;
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}
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static inline void (g_cond_wait)(CompatGCond *cond, CompatGMutex *mutex)
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{
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g_assert(mutex->once.status != G_ONCE_STATUS_PROGRESS);
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g_once(&cond->once, do_g_cond_new, NULL);
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g_cond_wait((GCond *) cond->once.retval, (GMutex *) mutex->once.retval);
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}
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#undef g_cond_wait
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static inline void (g_cond_broadcast)(CompatGCond *cond)
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{
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g_once(&cond->once, do_g_cond_new, NULL);
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g_cond_broadcast((GCond *) cond->once.retval);
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}
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#undef g_cond_broadcast
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static inline void (g_cond_signal)(CompatGCond *cond)
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{
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g_once(&cond->once, do_g_cond_new, NULL);
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g_cond_signal((GCond *) cond->once.retval);
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}
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#undef g_cond_signal
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/* before 2.31 there was no g_thread_new() */
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static inline GThread *g_thread_new(const char *name,
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GThreadFunc func, gpointer data)
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{
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GThread *thread = g_thread_create(func, data, TRUE, NULL);
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if (!thread) {
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g_error("creating thread");
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}
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return thread;
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}
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#else
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#define CompatGMutex GMutex
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#define CompatGCond GCond
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#endif /* glib 2.31 */
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#if !GLIB_CHECK_VERSION(2, 32, 0)
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/* Beware, function returns gboolean since 2.39.2, see GLib commit 9101915 */
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static inline void g_hash_table_add(GHashTable *hash_table, gpointer key)
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{
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g_hash_table_replace(hash_table, key, key);
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}
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#endif
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#ifndef g_assert_true
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#define g_assert_true(expr) \
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do { \
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if (G_LIKELY(expr)) { \
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} else { \
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g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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"'" #expr "' should be TRUE"); \
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} \
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} while (0)
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#endif
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#ifndef g_assert_false
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#define g_assert_false(expr) \
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do { \
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if (G_LIKELY(!(expr))) { \
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} else { \
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g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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"'" #expr "' should be FALSE"); \
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} \
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} while (0)
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#endif
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#ifndef g_assert_null
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#define g_assert_null(expr) \
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do { \
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if (G_LIKELY((expr) == NULL)) { \
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} else { \
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g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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"'" #expr "' should be NULL"); \
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} \
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} while (0)
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#endif
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#ifndef g_assert_nonnull
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#define g_assert_nonnull(expr) \
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do { \
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if (G_LIKELY((expr) != NULL)) { \
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} else { \
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g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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"'" #expr "' should not be NULL"); \
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} \
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} while (0)
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#endif
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#ifndef g_assert_cmpmem
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#define g_assert_cmpmem(m1, l1, m2, l2) \
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do { \
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gconstpointer __m1 = m1, __m2 = m2; \
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int __l1 = l1, __l2 = l2; \
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if (__l1 != __l2) { \
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g_assertion_message_cmpnum( \
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G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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#l1 " (len(" #m1 ")) == " #l2 " (len(" #m2 "))", __l1, "==", \
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__l2, 'i'); \
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} else if (memcmp(__m1, __m2, __l1) != 0) { \
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g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
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"assertion failed (" #m1 " == " #m2 ")"); \
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} \
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} while (0)
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#endif
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#endif
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