From 57e8823548ad6e65d33b2153edeb18fb0edc20e6 Mon Sep 17 00:00:00 2001
From: Austin Foxley <austinf@cetoncorp.com>
Date: Sat, 17 Oct 2009 14:32:36 -0700
Subject: cancellation support for a large amount of the required syscalls

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
---
 libc/misc/sysvipc/msgq.c | 53 +++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 46 insertions(+), 7 deletions(-)

(limited to 'libc/misc/sysvipc/msgq.c')

diff --git a/libc/misc/sysvipc/msgq.c b/libc/misc/sysvipc/msgq.c
index e43a9ed04..d67645a4d 100644
--- a/libc/misc/sysvipc/msgq.c
+++ b/libc/misc/sysvipc/msgq.c
@@ -1,6 +1,11 @@
 #include <errno.h>
 #include <sys/msg.h>
 #include "ipc.h"
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#include "sysdep-cancel.h"
+#else
+#define SINGLE_THREAD_P 1
+#endif
 
 
 #ifdef L_msgctl
@@ -43,31 +48,65 @@ struct new_msg_buf{
 
 #ifdef L_msgrcv
 #ifdef __NR_msgrcv
-_syscall5(int, msgrcv, int, msqid, void *, msgp, size_t, msgsz, long int, msgtyp, int, msgflg)
-#else
-int msgrcv (int msqid, void *msgp, size_t msgsz,
-	long int msgtyp, int msgflg)
+#define __NR___syscall_msgrcv __NR_msgrcv
+static inline _syscall5(int, __syscall_msgrcv, int, msqid, void *, msgp,
+			size_t, msgsz, long int, msgtyp, int, msgflg)
+#endif
+static inline int do_msgrcv (int msqid, void *msgp, size_t msgsz,
+			    long int msgtyp, int msgflg)
 {
+#ifdef __NR_msgrcv
+    return __syscall_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg);
+#else
     struct new_msg_buf temp;
 
     temp.r_msgtyp = msgtyp;
     temp.oldmsg = msgp;
     return __syscall_ipc(IPCOP_msgrcv ,msqid ,msgsz ,msgflg ,&temp, 0);
+#endif
 }
+int msgrcv (int msqid, void *msgp, size_t msgsz,
+	    long int msgtyp, int msgflg)
+{
+    if (SINGLE_THREAD_P)
+	return do_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg);
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+    int oldtype = LIBC_CANCEL_ASYNC ();
+    int result = do_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg);
+    LIBC_CANCEL_RESET (oldtype);
+    return result;
 #endif
+}
 #endif
 
 
 
 #ifdef L_msgsnd
 #ifdef __NR_msgsnd
-_syscall4(int, msgsnd, int, msqid, const void *, msgp, size_t, msgsz, int, msgflg)
-#else
+#define __NR___syscall_msgsnd __NR_msgsnd
+static inline _syscall4(int, __syscall_msgsnd, int, msqid, const void *, msgp,
+			size_t, msgsz, int, msgflg)
+#endif
 /* Send message to message queue.  */
-int msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
+static inline int do_msgsnd (int msqid, const void *msgp, size_t msgsz,
+			    int msgflg)
 {
+#ifdef __NR_msgsnd
+    return __syscall_msgsnd(msqid, msgp, msgsz, msgflg);
+#else
     return __syscall_ipc(IPCOP_msgsnd, msqid, msgsz, msgflg, (void *)msgp, 0);
+#endif
 }
+int msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
+{
+    if (SINGLE_THREAD_P)
+	return do_msgsnd(msqid, msgp, msgsz, msgflg);
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+    int oldtype = LIBC_CANCEL_ASYNC ();
+    int result = do_msgsnd(msqid, msgp, msgsz, msgflg);
+    LIBC_CANCEL_RESET (oldtype);
+    return result;
 #endif
+}
 #endif
 
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