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| author | Rickard Green <[email protected]> | 2018-03-21 11:54:28 +0100 |
|---|---|---|
| committer | GitHub <[email protected]> | 2018-03-21 11:54:28 +0100 |
| commit | cf3cbf0871832cb0808293842e5ae726edfc12e1 (patch) | |
| tree | cd67d38d40c3414275ec257a6685b86c949c621a /erts/emulator/beam/erl_term.h | |
| parent | 2c5711efcdd48ab8a9b7cd9ae27c97b9c1f8c37e (diff) | |
| parent | 4bc282d812cc2c49aa3e2d073e96c720f16aa270 (diff) | |
| download | otp-cf3cbf0871832cb0808293842e5ae726edfc12e1.tar.gz otp-cf3cbf0871832cb0808293842e5ae726edfc12e1.tar.bz2 otp-cf3cbf0871832cb0808293842e5ae726edfc12e1.zip | |
Merge pull request #1740 from rickard-green/rickard/signals/OTP-14589
Implementation of true asynchronous signaling between processes
Diffstat (limited to 'erts/emulator/beam/erl_term.h')
| -rw-r--r-- | erts/emulator/beam/erl_term.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h index 3dd1c2555c..18483fca35 100644 --- a/erts/emulator/beam/erl_term.h +++ b/erts/emulator/beam/erl_term.h @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 2000-2017. All Rights Reserved. + * Copyright Ericsson AB 2000-2018. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -345,6 +345,9 @@ _ET_DECLARE_CHECKED(Uint,thing_subtag,Eterm) * * To help find code which makes unwarranted assumptions about zero, * we now use a non-zero bit-pattern in debug mode. + * + * In order to be able to differentiata against values, the non-value + * needs to be tagged as a header of some sort. */ #if ET_DEBUG # ifdef HIPE @@ -355,7 +358,7 @@ _ET_DECLARE_CHECKED(Uint,thing_subtag,Eterm) # define THE_NON_VALUE _make_header(0,_TAG_HEADER_FLOAT) # endif #else -#define THE_NON_VALUE (0) +#define THE_NON_VALUE (TAG_PRIMARY_HEADER) #endif #define is_non_value(x) ((x) == THE_NON_VALUE) #define is_value(x) ((x) != THE_NON_VALUE) |