Changeset 3767bdb in mainline

Timestamp:

2018-08-03T16:56:31Z (6 years ago)

Author:

Jiří Zárevúcky <jiri.zarevucky@…>

Branches:

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

Children:

e71c023

Parents:

c92dfed

git-author:

Jiří Zárevúcky <jiri.zarevucky@…> (2018-08-03 15:56:58)

git-committer:

Jiří Zárevúcky <jiri.zarevucky@…> (2018-08-03 16:56:31)

Message:

Add new form atomic builtins for arm.

File:

• uspace/lib/c/generic/thread/atomic.c (modified) (1 diff)

uspace/lib/c/generic/thread/atomic.c

@@ -72 +72 @@
 }
 
+unsigned __atomic_fetch_add_4(unsigned *mem, unsigned val, int model)
+{
+        // TODO
+        (void) model;
+
+        return __sync_add_and_fetch_4(mem, val) - val;
+}
+
+unsigned __atomic_fetch_sub_4(unsigned *mem, unsigned val, int model)
+{
+        // TODO
+        (void) model;
+
+        return __sync_sub_and_fetch_4(mem, val) + val;
+}
+
+bool __atomic_compare_exchange_4(unsigned *mem, unsigned *expected, unsigned desired, bool weak, int success, int failure)
+{
+        // TODO
+        (void) success;
+        (void) failure;
+        (void) weak;
+
+        unsigned old = __sync_val_compare_and_swap_4(mem, *expected, desired);
+        if (old == *expected)
+                return true;
+
+        *expected = old;
+        return false;
+}
+
 #endif