KOKO\Mimi
22 lines
750 B
C++
22 lines
750 B
C++
#ifndef FESA_SRC_FESA_ELEMENTS_HEX8_LINEAR_TANGENT_CACHE_H_
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#define FESA_SRC_FESA_ELEMENTS_HEX8_LINEAR_TANGENT_CACHE_H_
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#include <mutex>
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#include "fesa/math/matrix.h"
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namespace fesa::hex8_internal {
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/// @brief Shares one immutable paired Hessian among identical element copies.
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/// @note Only call_once preparation writes. Linear readers synchronize through
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/// the flag; nonlinear trials do not access this optional state. At most two
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/// 24-by-24 matrices (9216 value bytes) are retained after successful preparation.
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struct LinearTangentCache {
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std::once_flag preparation;
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bool ready{false};
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Matrix high{0U, 0U};
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Matrix low{0U, 0U};
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};
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} // namespace fesa::hex8_internal
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#endif // FESA_SRC_FESA_ELEMENTS_HEX8_LINEAR_TANGENT_CACHE_H_
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