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Yi Wu 77a8d4d476 Detect if Jemalloc is linked with the binary (#4844) 
Summary:
Declare Jemalloc non-standard APIs as weak symbols, so that if Jemalloc is linked with the binary, these symbols will be replaced by Jemalloc's, otherwise they will be nullptr. This is similar to how folly detect jemalloc, but we assume the main program use jemalloc as long as jemalloc is linked: https://github.com/facebook/folly/blob/master/folly/memory/Malloc.h#L147
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4844

Differential Revision: D13574934

Pulled By: yiwu-arbug

fbshipit-source-id: 7ea871beb1be7d5a1259cc38f9b78078793db2db
2019-01-03 16:30:12 -08:00
..
win Update all unique/shared_ptr instances to be qualified with namespace std (#4638) 2018-11-09 11:19:58 -08:00
dirent.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
jemalloc_helper.h Detect if Jemalloc is linked with the binary (#4844) 2019-01-03 16:30:12 -08:00
likely.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
port.h Change RocksDB License 2017-07-15 16:11:23 -07:00
port_example.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
port_posix.cc port_posix: use posix_memalign() for aligned_alloc 2018-05-24 12:13:16 -07:00
port_posix.h Explictly fail writes if key or value is not smaller than 4GB 2018-02-09 14:57:54 -08:00
README
stack_trace.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
stack_trace.h Change RocksDB License 2017-07-15 16:11:23 -07:00
sys_time.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
util_logger.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
xpress.h Change RocksDB License 2017-07-15 16:11:23 -07:00

README 

This directory contains interfaces and implementations that isolate the
rest of the package from platform details.

Code in the rest of the package includes "port.h" from this directory.
"port.h" in turn includes a platform specific "port_<platform>.h" file
that provides the platform specific implementation.

See port_posix.h for an example of what must be provided in a platform
specific header file.