path: root/firmware/kernel
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authorMichael Sevakis <>2014-04-28 09:15:06 -0400
committerMichael Sevakis <>2014-05-09 23:14:58 +0200
commit355b5406fafe0d45285e70a0b01d5e674d6a2c16 (patch)
treeb17e42d8e36182280cf7399c9063a6db8b2f4fc9 /firmware/kernel
parentf444ae70ebe9c978818bf473d176538244b4559e (diff)
Make errno a thread-local variable.
errno is supposed to be thread local and we do that here in a rather makeshift way by implementing a function that returns a pointer to the __errno variable in the thread block. If more serious TLS is required, perhaps it would be worthwhile implementing it using the linker and the "__thread" storage attribute. That's a bit overkill just for this. I'm also not liking what I saw the compiler producing. Change-Id: I03bc0bd6a89f6e3d6bae7653284ee01054614f9a Reviewed-on: Reviewed-by: Michael Sevakis <> Tested: Michael Sevakis <>
Diffstat (limited to 'firmware/kernel')
1 files changed, 1 insertions, 0 deletions
diff --git a/firmware/kernel/include/thread.h b/firmware/kernel/include/thread.h
index 9cc33b23ae..8c13b462e6 100644
--- a/firmware/kernel/include/thread.h
+++ b/firmware/kernel/include/thread.h
@@ -210,6 +210,7 @@ struct thread_entry
volatile intptr_t retval; /* Return value from a blocked operation/
misc. use */
+ int __errno; /* Thread error number (errno tls) */
/* Priority summary of owned objects that support inheritance */
struct blocker *blocker; /* Pointer to blocker when this thread is blocked