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84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/* segment.h
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* Copyright 1984-2017 Cisco Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef WIN32
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# ifndef __MINGW32__
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# undef FORCEINLINE
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# define FORCEINLINE static __forceinline
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# endif
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#else
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#define FORCEINLINE static inline
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#endif
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/* segment_info */
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#define SEGMENT_T1_SIZE (1<<segment_t1_bits)
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#define SEGMENT_T1_IDX(i) ((i)&(SEGMENT_T1_SIZE-1))
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#ifdef segment_t3_bits
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#define SEGMENT_T2_SIZE (1<<segment_t2_bits)
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#define SEGMENT_T2_IDX(i) (((i)>>segment_t1_bits)&(SEGMENT_T2_SIZE-1))
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#define SEGMENT_T3_SIZE (1<<segment_t3_bits)
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#define SEGMENT_T3_IDX(i) ((i)>>(segment_t2_bits+segment_t1_bits))
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FORCEINLINE seginfo *SegInfo(uptr i) {
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return S_segment_info[SEGMENT_T3_IDX(i)]->t2[SEGMENT_T2_IDX(i)]->t1[SEGMENT_T1_IDX(i)];
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}
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FORCEINLINE seginfo *MaybeSegInfo(uptr i) {
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t2table *t2i; t1table *t1i;
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if ((t2i = S_segment_info[SEGMENT_T3_IDX(i)]) == NULL) return NULL;
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if ((t1i = t2i->t2[SEGMENT_T2_IDX(i)]) == NULL) return NULL;
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return t1i->t1[SEGMENT_T1_IDX(i)];
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}
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#else /* segment_t3_bits */
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#ifdef segment_t2_bits
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#define SEGMENT_T2_SIZE (1<<segment_t2_bits)
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#define SEGMENT_T2_IDX(i) ((i)>>segment_t1_bits)
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#define SEGMENT_T3_SIZE 0
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FORCEINLINE seginfo *SegInfo(uptr i) {
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return S_segment_info[SEGMENT_T2_IDX(i)]->t1[SEGMENT_T1_IDX(i)];
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}
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FORCEINLINE seginfo *MaybeSegInfo(uptr i) {
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t1table *t1i;
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if ((t1i = S_segment_info[SEGMENT_T2_IDX(i)]) == NULL) return NULL;
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return t1i->t1[SEGMENT_T1_IDX(i)];
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}
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#else /* segment_t2_bits */
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#define SEGMENT_T2_SIZE 0
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#define SEGMENT_T3_SIZE 0
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FORCEINLINE seginfo *SegInfo(uptr i) {
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return S_segment_info[SEGMENT_T1_IDX(i)];
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}
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FORCEINLINE seginfo *MaybeSegInfo(uptr i) {
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return S_segment_info[SEGMENT_T1_IDX(i)];
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}
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#endif /* segment_t2_bits */
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#endif /* segment_t3_bits */
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#define SegmentSpace(i) (SegInfo(i)->space)
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#define SegmentGeneration(i) (SegInfo(i)->generation)
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