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ea99f21ce6
By default, Newlib uses a huge object of type struct _reent to store thread-specific data. This object is returned by __getreent() if the __DYNAMIC_REENT__ Newlib configuration option is defined. The reentrancy structure contains for example errno and the standard input, output, and error file streams. This means that if an application only uses errno it has a dependency on the file stream support even if it does not use it. This is an issue for lower end targets and applications which need to qualify the software according to safety standards (for example ECSS-E-ST-40C, ECSS-Q-ST-80C, IEC 61508, ISO 26262, DO-178, DO-330, DO-333). If the new _REENT_THREAD_LOCAL configuration option is enabled, then struct _reent is replaced by dedicated thread-local objects for each struct _reent member. The thread-local objects are defined in translation units which use the corresponding object.
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
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* Copyright (c) 1993 Martin Birgmeier
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* All rights reserved.
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*
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* You may redistribute unmodified or modified versions of this source
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* code provided that the above copyright notice and this and the
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* following conditions are retained.
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*
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* This software is provided ``as is'', and comes with no warranties
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* of any kind. I shall in no event be liable for anything that happens
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* to anyone/anything when using this software.
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*/
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#include "rand48.h"
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#ifdef _REENT_THREAD_LOCAL
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_Thread_local unsigned short _tls_rand48_seed[3] = {_RAND48_SEED_0, _RAND48_SEED_1,
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_RAND48_SEED_2};
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_Thread_local unsigned short _tls_rand48_mult[3] = {_RAND48_MULT_0, _RAND48_MULT_1,
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_RAND48_MULT_2};
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_Thread_local unsigned short _tls_rand48_add = _RAND48_ADD;
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#endif
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void
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_lcong48_r (struct _reent *r,
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unsigned short p[7])
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{
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_REENT_CHECK_RAND48(r);
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__rand48_seed[0] = p[0];
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__rand48_seed[1] = p[1];
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__rand48_seed[2] = p[2];
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__rand48_mult[0] = p[3];
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__rand48_mult[1] = p[4];
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__rand48_mult[2] = p[5];
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__rand48_add = p[6];
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}
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#ifndef _REENT_ONLY
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void
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lcong48 (unsigned short p[7])
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{
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_lcong48_r (_REENT, p);
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}
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#endif /* !_REENT_ONLY */
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