| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: buffer.H |
| 5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. |
| 7 | * |
| 8 | * The above named program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public |
| 10 | * License version 2 as published by the Free Software Foundation. |
| 11 | * |
| 12 | * The above named program is distributed in the hope that it will be |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public |
| 18 | * License along with this work; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * |
| 21 | * ========== Copyright Header End ============================================ |
| 22 | */ |
| 23 | // ========== Copyright Header Begin ========================================== |
| 24 | // |
| 25 | // OpenSPARC T2 Processor File: buffer.H |
| 26 | // Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 27 | // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. |
| 28 | // |
| 29 | // The above named program is free software; you can redistribute it and/or |
| 30 | // modify it under the terms of the GNU General Public |
| 31 | // License version 2 as published by the Free Software Foundation. |
| 32 | // |
| 33 | // The above named program is distributed in the hope that it will be |
| 34 | // useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 35 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 36 | // General Public License for more details. |
| 37 | // |
| 38 | // You should have received a copy of the GNU General Public |
| 39 | // License along with this work; if not, write to the Free Software |
| 40 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| 41 | // |
| 42 | // ========== Copyright Header End ============================================ |
| 43 | #ifndef _BUFFER_H |
| 44 | #define _BUFFER_H |
| 45 | |
| 46 | #include <stdlib.h> |
| 47 | #include <sys/types.h> |
| 48 | |
| 49 | typedef struct { |
| 50 | rstf_unionT* rst; |
| 51 | unsigned nrecs; |
| 52 | } RstSplit; |
| 53 | |
| 54 | class RstzipBuffer { |
| 55 | public: |
| 56 | rstf_unionT* rstbuf; |
| 57 | int nrecs; |
| 58 | int curindex; |
| 59 | |
| 60 | RstzipBuffer(int bufsize) { |
| 61 | rstbuf = (rstf_unionT*) malloc((bufsize + PADDING) * sizeof(rstf_unionT)); |
| 62 | nrecs = 0; |
| 63 | curindex = 0; |
| 64 | buffersize = bufsize; |
| 65 | } |
| 66 | |
| 67 | ~RstzipBuffer() { |
| 68 | free(rstbuf); |
| 69 | } |
| 70 | |
| 71 | int fillBuffer(rstf_unionT* buf, int bufrecs) { |
| 72 | if (nrecs + bufrecs < buffersize + PADDING) { |
| 73 | memcpy(&rstbuf[nrecs], buf, bufrecs * sizeof(rstf_unionT)); |
| 74 | nrecs += bufrecs; |
| 75 | } else { |
| 76 | fprintf(stderr, "Error: in FillRstBuffer::fillBuffer(): nrecs=%d, bufrecs=%d, max buffersize is %d\n", |
| 77 | nrecs, bufrecs, buffersize + PADDING); |
| 78 | exit(1); |
| 79 | } |
| 80 | |
| 81 | return nrecs; |
| 82 | } |
| 83 | |
| 84 | int getLastCpuRecIndex() { |
| 85 | int i; |
| 86 | |
| 87 | for (i = nrecs - 1; i >= 0; i--) { |
| 88 | if (rstbuf[i].proto.rtype == CPU_T) { |
| 89 | break; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | return i; |
| 94 | } |
| 95 | |
| 96 | int shiftBuffer(int index) { |
| 97 | if (index > nrecs) { |
| 98 | fprintf(stderr, "Error: in RstzipBuffer::shiftBuffer() index (%d) > nrecs (%d)\n", index, nrecs); |
| 99 | exit(1); |
| 100 | } |
| 101 | |
| 102 | if (index > 0) { |
| 103 | // Only do this if we have something to move. |
| 104 | // index = 0 when we flush this buffer; index = -1 when we're done decompressing. |
| 105 | nrecs -= index; |
| 106 | memmove(&rstbuf[0], &rstbuf[index], nrecs * sizeof(rstf_unionT)); |
| 107 | } else { |
| 108 | nrecs = 0; |
| 109 | } |
| 110 | |
| 111 | curindex = 0; |
| 112 | |
| 113 | return nrecs; |
| 114 | } |
| 115 | |
| 116 | protected: |
| 117 | enum { |
| 118 | PADDING = 1000 |
| 119 | }; |
| 120 | |
| 121 | int buffersize; |
| 122 | }; // RstzipBuffer |
| 123 | |
| 124 | #endif // _BUFFER_H |