From 6baec251d292cc4b52bafc8eb598c8a95c09cc91 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 19 Aug 2008 23:18:20 +0200
Subject: use final glibc eventfd() instead of our homegrown syscall
 invocations

---
 configure.ac          |  1 +
 src/pulsecore/fdsem.c | 50 +++++++++++++-------------------------------------
 2 files changed, 14 insertions(+), 37 deletions(-)

diff --git a/configure.ac b/configure.ac
index ca0585bb..568f43a2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -296,6 +296,7 @@ AC_CHECK_HEADERS([windows.h winsock2.h ws2tcpip.h])
 AC_CHECK_HEADERS([sys/ioctl.h])
 AC_CHECK_HEADERS([byteswap.h])
 AC_CHECK_HEADERS([sys/syscall.h])
+AC_CHECK_HEADERS([sys/eventfd.h])
 
 #### Typdefs, structures, etc. ####
 
diff --git a/src/pulsecore/fdsem.c b/src/pulsecore/fdsem.c
index 2a7ae589..380f34f5 100644
--- a/src/pulsecore/fdsem.c
+++ b/src/pulsecore/fdsem.c
@@ -41,39 +41,15 @@
 #include <pulsecore/pipe.h>
 #endif
 
-#ifdef __linux__
-
-#if !defined(__NR_eventfd) && defined(__i386__)
-#define __NR_eventfd 323
-#endif
-
-#if !defined(__NR_eventfd) && defined(__x86_64__)
-#define __NR_eventfd 284
-#endif
-
-#if !defined(__NR_eventfd) && defined(__arm__)
-#define __NR_eventfd (__NR_SYSCALL_BASE+351)
-#endif
-
-#if !defined(SYS_eventfd) && defined(__NR_eventfd)
-#define SYS_eventfd __NR_eventfd
-#endif
-
-#ifdef SYS_eventfd
-#define HAVE_EVENTFD
-
-static inline long eventfd(unsigned count) {
-    return syscall(SYS_eventfd, count);
-}
-
-#endif
+#ifdef HAVE_SYS_EVENTFD_H
+#include <sys/eventfd.h>
 #endif
 
 #include "fdsem.h"
 
 struct pa_fdsem {
     int fds[2];
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
     int efd;
 #endif
 
@@ -85,8 +61,8 @@ pa_fdsem *pa_fdsem_new(void) {
 
     f = pa_xmalloc(PA_ALIGN(sizeof(pa_fdsem)) + PA_ALIGN(sizeof(pa_fdsem_data)));
 
-#ifdef HAVE_EVENTFD
-    if ((f->efd = eventfd(0)) >= 0) {
+#ifdef HAVE_SYS_EVENTFD_H
+    if ((f->efd = eventfd(0, 0)) >= 0) {
         pa_make_fd_cloexec(f->efd);
         f->fds[0] = f->fds[1] = -1;
     } else
@@ -116,7 +92,7 @@ pa_fdsem *pa_fdsem_open_shm(pa_fdsem_data *data, int event_fd) {
     pa_assert(data);
     pa_assert(event_fd >= 0);
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
     f = pa_xnew(pa_fdsem, 1);
 
     f->efd = event_fd;
@@ -134,11 +110,11 @@ pa_fdsem *pa_fdsem_new_shm(pa_fdsem_data *data, int* event_fd) {
     pa_assert(data);
     pa_assert(event_fd);
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
 
     f = pa_xnew(pa_fdsem, 1);
 
-    if ((f->efd = eventfd(0)) < 0) {
+    if ((f->efd = eventfd(0, 0)) < 0) {
         pa_xfree(f);
         return NULL;
     }
@@ -159,7 +135,7 @@ pa_fdsem *pa_fdsem_new_shm(pa_fdsem_data *data, int* event_fd) {
 void pa_fdsem_free(pa_fdsem *f) {
     pa_assert(f);
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
     if (f->efd >= 0)
         pa_close(f->efd);
 #endif
@@ -178,7 +154,7 @@ static void flush(pa_fdsem *f) {
     do {
         char x[10];
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
         if (f->efd >= 0) {
             uint64_t u;
 
@@ -211,7 +187,7 @@ void pa_fdsem_post(pa_fdsem *f) {
 
             for (;;) {
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
                 if (f->efd >= 0) {
                     uint64_t u = 1;
 
@@ -247,7 +223,7 @@ void pa_fdsem_wait(pa_fdsem *f) {
         char x[10];
         ssize_t r;
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
         if (f->efd >= 0) {
             uint64_t u;
 
@@ -285,7 +261,7 @@ int pa_fdsem_try(pa_fdsem *f) {
 int pa_fdsem_get(pa_fdsem *f) {
     pa_assert(f);
 
-#ifdef HAVE_EVENTFD
+#ifdef HAVE_SYS_EVENTFD_H
     if (f->efd >= 0)
         return f->efd;
 #endif
-- 
cgit