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| author | Sverker Eriksson <[email protected]> | 2017-01-12 18:12:38 +0100 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2017-01-12 18:12:38 +0100 |
| commit | 9e862df2bf26b9b1d79ba3b447945b7c0612e3d0 (patch) | |
| tree | 8aac2a9cb645ecc836f749f5fee793df2018bad7 /erts/emulator/beam/erl_process_lock.h | |
| parent | 1239d92556cc0a7921648cbd4abd9f9a397b29b8 (diff) | |
| download | otp-9e862df2bf26b9b1d79ba3b447945b7c0612e3d0.tar.gz otp-9e862df2bf26b9b1d79ba3b447945b7c0612e3d0.tar.bz2 otp-9e862df2bf26b9b1d79ba3b447945b7c0612e3d0.zip | |
erts: Add macro ERTS_PROC_LOCKS_HIGHER_THAN
to safeguard against bugs due to future proc lock changes.
The two places now using ERTS_PROC_LOCKS_HIGHER_THAN were
kind of bugs as BTM and TRACE locks were missing. But there was
probably no way to get there with BTM or TRACE locked.
Diffstat (limited to 'erts/emulator/beam/erl_process_lock.h')
| -rw-r--r-- | erts/emulator/beam/erl_process_lock.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_process_lock.h b/erts/emulator/beam/erl_process_lock.h index 2cccf0697a..e7d68f0a09 100644 --- a/erts/emulator/beam/erl_process_lock.h +++ b/erts/emulator/beam/erl_process_lock.h @@ -219,6 +219,10 @@ typedef struct erts_proc_lock_t_ { #define ERTS_PROC_LOCKS_ALL_MINOR (ERTS_PROC_LOCKS_ALL \ & ~ERTS_PROC_LOCK_MAIN) +/* All locks we first must unlock to lock L */ +#define ERTS_PROC_LOCKS_HIGHER_THAN(L) \ + (ERTS_PROC_LOCKS_ALL & (~(L) & ~((L)-1))) + #define ERTS_PIX_LOCKS_BITS 10 #define ERTS_NO_OF_PIX_LOCKS (1 << ERTS_PIX_LOCKS_BITS) |