newlib: struct dirent

pixlib3: enable linear texture filtration
libsync: user space synchronization

git-svn-id: svn://kolibrios.org@5602 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/libsync/m_lock.asm

@@ -0,0 +1,41 @@
+format MS COFF
+use32
+
+MUTEX.lock      equ 0
+MUTEX.handle    equ 4
+
+section '.text' align 16 code readable executable
+
+public @mutex_lock@4
+
+@mutex_lock@4:
+
+        mov     eax, 1
+        lock xadd [ecx+MUTEX.lock], eax
+        test    eax, eax
+        jnz     .slow
+        ret
+.slow:
+        push    ebx
+        push    esi
+        push    edi
+        mov     edi, ecx
+        mov     ecx, [edi+MUTEX.handle]
+        mov     edx, 2
+        mov     ebx, edx
+        xor     esi, esi
+align 4
+.again:
+        mov     eax, edx
+        xchg    eax, [edi+MUTEX.lock]
+        test    eax, eax
+        jz      .ok
+
+        mov     eax, 77
+        int     0x40
+        jmp     .again
+.ok:
+        pop     edi
+        pop     esi
+        pop     ebx
+        ret