diff options
Diffstat (limited to 'erts/emulator/beam/code_ix.h')
| -rw-r--r-- | erts/emulator/beam/code_ix.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/erts/emulator/beam/code_ix.h b/erts/emulator/beam/code_ix.h index 99fd4ec348..66543fa2a8 100644 --- a/erts/emulator/beam/code_ix.h +++ b/erts/emulator/beam/code_ix.h @@ -55,10 +55,13 @@ # endif # include "sys.h" #endif +struct process; + #define ERTS_NUM_CODE_IX 3 typedef unsigned ErtsCodeIndex; + /* Called once at emulator initialization. */ void erts_code_ix_init(void); @@ -78,14 +81,13 @@ ErtsCodeIndex erts_active_code_ix(void); ERTS_GLB_INLINE ErtsCodeIndex erts_staging_code_ix(void); -/* Lock code_ix. - * Gives (exclusive) access to the staging area and write access to active code index. - * ToDo: Waiting process should be queued and return to be suspended. +/* Try lock code_ix that is needed for (exlusive) access of the staging area. + * Main process lock (only) must be held. + * Caller is suspended and *must* yield if 0 is returned. */ -void erts_lock_code_ix(void); +int erts_try_lock_code_ix(struct process*); /* Unlock code_ix - * ToDo: Dequeue and resume waiting processes. */ void erts_unlock_code_ix(void); |