kernel: pipes - improved synchronization

git-svn-id: svn://kolibrios.org@6929 a494cfbc-eb01-0410-851d-a64ba20cac60
2017-06-16 22:47:00 +00:00
parent 65af271ccd
commit 8b1036ed49
3 changed files with 101 additions and 23 deletions
--- a/kernel/trunk/posix/posix.inc
+++ b/kernel/trunk/posix/posix.inc
@@ -88,6 +88,9 @@ sys_read:
        cmp     [ebp+FILED.handle], ecx
        jne     .fail

+        test    [ebp+FILED.mode], F_READ
+        jz      .fail
+
        mov     ebp, [ebp+FILED.file]
        mov     eax, [ebp]
        jmp     dword [eax+FILEOP_READ*4]
@@ -114,6 +117,8 @@ sys_write:
        jne     .fail
        cmp     [ebp+FILED.handle], ecx
        jne     .fail
+        test    [ebp+FILED.mode], F_WRITE
+        jz      .fail

        mov     ebp, [ebp+FILED.file]
        mov     eax, [ebp]