Fix tsd cleanup regressions that were introduced in 5460aa6f6676c7f253bfcb75c028dfd38cae8aaf (Convert all tsd variables to reside in a single tsd structure.). These regressions were twofold: 1) tsd_tryget() should never (and need never) return NULL. Rename it to tsd_fetch() and simplify all callers. 2) tsd_*_set() must only be called when tsd is in the nominal state, because cleanup happens during the nominal-->purgatory transition, and re-initialization must not happen while in the purgatory state. Add tsd_nominal() and use it as needed. Note that tsd_*{p,}_get() can still be used as long as no re-initialization that would require cleanup occurs. This means that e.g. the thread_allocated counter can be updated unconditionally.
jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. jemalloc first came into use as the FreeBSD libc allocator in 2005, and since then it has found its way into numerous applications that rely on its predictable behavior. In 2010 jemalloc development efforts broadened to include developer support features such as heap profiling, Valgrind integration, and extensive monitoring/tuning hooks. Modern jemalloc releases continue to be integrated back into FreeBSD, and therefore versatility remains critical. Ongoing development efforts trend toward making jemalloc among the best allocators for a broad range of demanding applications, and eliminating/mitigating weaknesses that have practical repercussions for real world applications. The COPYING file contains copyright and licensing information. The INSTALL file contains information on how to configure, build, and install jemalloc. The ChangeLog file contains a brief summary of changes for each release. URL: http://www.canonware.com/jemalloc/
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