Added an allocator function to allocate the hash in shared memory.
Added also locking stuff

Pre-Submission Checklist

Commit message has the format required by CONTRIBUTING guide
Commits are split per component (core, individual modules, libs, utils, ...)
Each component has a single commit (if not, squash them into one commit)
No commits to README files for modules (changes must be done to docbook files
in doc/ subfolder, the README file is autogenerated)

Type Of Change

Small bug fix (non-breaking change which fixes an issue)
New feature (non-breaking change which adds new functionality)
Breaking change (fix or feature that would change existing functionality)

Checklist:

PR should be backported to stable branches
Tested changes locally
Related to issue #XXXX (replace XXXX with an open issue number)

Description

Added a new allocator function to str_hash.h. This new function allows to allocate the hash table in shared memory.

Changes to struct str_hash_table:

Added a gen_lock_set_t (locks) to hold the lock set
Added an int (locks_no) to hold the number of locks
Added an indicator (memory) to know if the table was allocated in private memory (p) or shared memory(s)

Changes to struct str_hash_head:

Added an int(lock_idx) that hold the index of the lock when the head is locked.

Changes to struct str_hash_entry:

Added a pointer to the head the entry belongs to. This allows to unlock the head when needed.

Added functions to lock and unlock the head when needed.

Modified functions str_hash_add and str_hash_get to lock the head when needed

Added function str_hash_destroy to remove the hash table and all its contents from memory.

You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/1535

Commit Summary

str_hash: Option to allocate hash in shm

File Changes

M src/core/str_hash.h (100)

Patch Links:

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