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* Include <stddef.h> to fix build problem when namespace pollutiondeischen2002-01-111-7/+8
| | | | | | | | | by <signal.h> (including <time.h> so that NULL is accidentally defined) is removed. Style nits. Submitted by: bde
* Add getcontext, setcontext, makecontext, and swapcontext. Thesedeischen2002-01-101-0/+54
functions are defined in SUSv2 and the latest POSIX spec. Thanks to Bernd Walter <ticso@cicely8.cicely.de> for helping debug my alpha assembly. Approved by: -arch
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