Changeset 1cef26f in mainline

Timestamp:

2006-03-22T22:30:40Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

29a9f62

Parents:

7e2988c

Message:

Basic futex support for userspace.

Files:

• init/init.c (modified) (4 diffs)
• libc/Makefile (modified) (1 diff)
• libc/generic/futex.c (added)
• libc/include/futex.h (added)

init/init.c

@@ -34 +34 @@
 #include <ns.h>
 #include <thread.h>
+#include <futex.h>
 
 int a;
+atomic_t ftx;
 
 extern void utest(void *arg);
@@ -41 +43 @@
 {
         printf("Uspace thread started.\n");
+        if (futex_down(&ftx) < 0)
+                printf("Futex failed.\n");
+        if (futex_up(&ftx) < 0)
+                printf("Futex failed.\n");
+                
+        printf("%s in good condition.\n", __FUNCTION__);
+        
         for (;;)
                 ;
@@ -244 +253 @@
 }
 
+
+
 int main(int argc, char *argv[])
 {
@@ -256 +267 @@
 //      test_hangup();
 //      test_slam();
+        
+        futex_initialize(&ftx, 1);
+        if (futex_down(&ftx) < 0)
+                printf("Futex failed.\n");
+        if (futex_up(&ftx) < 0)
+                printf("Futex failed.\n");
+
+        if (futex_down(&ftx) < 0)
+                printf("Futex failed.\n");
 
         if ((tid = thread_create(utest, NULL, "utest") != -1)) {
                 printf("Created thread tid=%d\n", tid);
         }
+
+        int i;
+        
+        for (i = 0; i < 10000000; i++)
+                ;
+                
+        if (futex_up(&ftx) < 0)
+                printf("Futex failed.\n");
+
+        printf("Main thread exiting.\n");
         return 0;
 }

libc/Makefile

@@ -47 +47 @@
         generic/string.c \
         generic/thread.c \
+        generic/futex.c \
         generic/io/io.c \
         generic/io/print.c \