mmap(2) returns MAP_FAILED ((void*)-1) on error, not NULL. The check
'if (likely(ret))' treats MAP_FAILED as truthy, so the emergency retry
path is never reached and callers receive MAP_FAILED as a valid pointer.
Normalize pmem_mmap() to return NULL on failure (converting MAP_FAILED
to NULL in the mmap path). This confines the platform-specific error
handling to one place and eliminates the need for preprocessor checks
in pmem_mmap_safe() and psync_mmap_anon_emergency().
Fixes GH #226
Co-authored-by: Levi Neely <lkn@darkstar.example.net>
* another stupid macro gone
* more stupid macros gone. moved util functions from plibs to putil
* remaining plist and ptask functions moved to appropriate namespaces
* dead code beleted!
* bugfixes
* move sql functions to psql.c
* move sort functions into ppagecache
* psql namespace
* change plibs.h include to pdbg.h
* cleanup includes
* code cleanup and removal
- remove useless wrapper functions
- remove obfuscating typedefs
- code reorganization and reformatting
- function renames for clarification
* prepare pcompat.h for decomposition
* remove dead function psync_rebuild_icons, reorganize pfsstatic.c headers
* separate pdevice from pcompat
* reorg function prototypes, remove more compat stuff
* renamed mutex for brevity
* remove dead debug code; plibs version is more sophisticated
* remove dead code, stale comments
* moved psync_delete_cached_crypto_keys to psynclib
* forgot to remove the function prototype from pdiff.h
* reorganized functions by accessibility, inlined useless psync_cache_contacts function
* remove unused header
* ppath object decomposed from pcompat
* ppath namespace
* ppath struct renames
* ppath final cleanup
* refactor, remove compatibility code
* format
* prun decomposed from pcompat for thread mgmt
* slim down prun.c
* remove useless comments
* move pagesize to pmemlock, pmemlock namespace
* pmem decomposed from pcompat, pmem namespace
* decompose psys from pcompat
* fix psys function names, remove more compatibility junk
* prand decomposed from pcompat
* psock decomposed from pcompat
* types renamed for ns consistency, brevity
* cleanup psock, remove unused proxy code
* remove unused headers psock
* putil for utility macros and functions
* forgot to move some psock constants
* move time macro to psys
* eliminate pcompat completely; new pfile namespace
* cleanup
- moved thread name definition
- explicit externs in implementation instead of headers for now
- better extern name
Levi Neely