kumquat-buildroot/package/pipewire/0004-modules-improve-_gettid-wrapper.patch

From 4c166709d06571b889a89812c962a91ba4d0a071 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89rico=20Nogueira?= <erico.erc@gmail.com>
Date: Tue, 20 Jul 2021 12:10:40 -0300
Subject: [PATCH] modules: improve _gettid wrapper

- use meson to check for gettid() function, always use if available
- use syscall fallback on linux, if not
- restrict thr_self() fallback to *only* FreeBSD
- error out if there isn't any gettid impl

[Retrieved from:
https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/4c166709d06571b889a89812c962a91ba4d0a071]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 meson.build                | 3 +++
 src/modules/module-rtkit.c | 8 ++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index 838fb66be..977ce9ba1 100644
--- a/meson.build
+++ b/meson.build
@@ -254,6 +254,9 @@ endif
 if cc.has_function('getpagesize', prefix : '#include<unistd.h>')
   cdata.set('HAVE_GETPAGESIZE', 1)
 endif
+if cc.has_function('gettid', prefix : '#include<unistd.h>', args: [ '-D_GNU_SOURCE' ])
+  cdata.set('HAVE_GETTID', 1)
+endif
 if cc.has_function('clock_gettime', prefix : '#include <time.h>')
   cdata.set('HAVE_CLOCK_GETTIME', 1)
 endif
diff --git a/src/modules/module-rtkit.c b/src/modules/module-rtkit.c
index 1f13aa371..7d55fb758 100644
--- a/src/modules/module-rtkit.c
+++ b/src/modules/module-rtkit.c
@@ -182,12 +182,16 @@ void pw_rtkit_bus_free(struct pw_rtkit_bus *system_bus)
 
 static pid_t _gettid(void)
 {
-#ifndef __FreeBSD__
+#if defined(HAVE_GETTID)
 	return (pid_t) gettid();
-#else
+#elif defined(__linux__)
+	return syscall(SYS_gettid);
+#elif defined(__FreeBSD__)
 	long pid;
 	thr_self(&pid);
 	return (pid_t)pid;
+#else
+#error "No gettid impl"
 #endif
 }
 
-- 
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