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https://gitlab.gnome.org/GNOME/glib.git
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4d2e77a554
Setting the main thread's scheduler settings is not reliably possible, especially not if SELinux or similar mechanisms are used to limit what can be done. As such, get rid of all the complicated code that tried to do this better and use a separate thread for spawning threads for the global shared thread pool. These will always inherit the priority of the main thread (or rather the thread that created the first shared thread pool). Fixes https://gitlab.gnome.org/GNOME/glib/-/issues/2769
122 lines
4.7 KiB
C
122 lines
4.7 KiB
C
/* GLIB - Library of useful routines for C programming
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*
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* gthreadprivate.h - GLib internal thread system related declarations.
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*
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* Copyright (C) 2003 Sebastian Wilhelmi
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __G_THREADPRIVATE_H__
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#define __G_THREADPRIVATE_H__
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#include "config.h"
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#include "deprecated/gthread.h"
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typedef struct _GRealThread GRealThread;
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struct _GRealThread
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{
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GThread thread;
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gint ref_count;
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gboolean ours;
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gchar *name;
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gpointer retval;
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};
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/* system thread implementation (gthread-posix.c, gthread-win32.c) */
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#if defined(HAVE_FUTEX) || defined(HAVE_FUTEX_TIME64)
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#include <errno.h>
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#include <linux/futex.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#ifndef FUTEX_WAIT_PRIVATE
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#define FUTEX_WAIT_PRIVATE FUTEX_WAIT
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#define FUTEX_WAKE_PRIVATE FUTEX_WAKE
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#endif
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/* Wrapper macro to call `futex_time64` and/or `futex` with simple
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* parameters and without returning the return value.
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*
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* If the `futex_time64` syscall does not exist (`ENOSYS`), we retry again
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* with the normal `futex` syscall. This can happen if newer kernel headers
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* are used than the kernel that is actually running.
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*
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* This must not be called with a timeout parameter as that differs
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* in size between the two syscall variants!
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*/
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#if defined(__NR_futex) && defined(__NR_futex_time64)
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#define g_futex_simple(uaddr, futex_op, ...) \
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G_STMT_START \
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{ \
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int res = syscall (__NR_futex_time64, uaddr, (gsize) futex_op, __VA_ARGS__); \
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if (res < 0 && errno == ENOSYS) \
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syscall (__NR_futex, uaddr, (gsize) futex_op, __VA_ARGS__); \
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} \
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G_STMT_END
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#elif defined(__NR_futex_time64)
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#define g_futex_simple(uaddr, futex_op, ...) \
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G_STMT_START \
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{ \
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syscall (__NR_futex_time64, uaddr, (gsize) futex_op, __VA_ARGS__); \
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} \
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G_STMT_END
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#elif defined(__NR_futex)
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#define g_futex_simple(uaddr, futex_op, ...) \
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G_STMT_START \
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{ \
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syscall (__NR_futex, uaddr, (gsize) futex_op, __VA_ARGS__); \
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} \
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G_STMT_END
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#else /* !defined(__NR_futex) && !defined(__NR_futex_time64) */
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#error "Neither __NR_futex nor __NR_futex_time64 are defined but were found by meson"
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#endif /* defined(__NR_futex) && defined(__NR_futex_time64) */
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#endif
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void g_system_thread_wait (GRealThread *thread);
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GRealThread *g_system_thread_new (GThreadFunc proxy,
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gulong stack_size,
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const char *name,
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GThreadFunc func,
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gpointer data,
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GError **error);
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void g_system_thread_free (GRealThread *thread);
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void g_system_thread_exit (void);
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void g_system_thread_set_name (const gchar *name);
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/* gthread.c */
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GThread *g_thread_new_internal (const gchar *name,
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GThreadFunc proxy,
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GThreadFunc func,
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gpointer data,
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gsize stack_size,
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GError **error);
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gpointer g_thread_proxy (gpointer thread);
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guint g_thread_n_created (void);
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gpointer g_private_set_alloc0 (GPrivate *key,
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gsize size);
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#endif /* __G_THREADPRIVATE_H__ */
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