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Diffstat (limited to 'rubbos/app/httpd-2.0.64/srclib/apr/misc/os2/randbyte.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/srclib/apr/misc/os2/randbyte.c | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/rubbos/app/httpd-2.0.64/srclib/apr/misc/os2/randbyte.c b/rubbos/app/httpd-2.0.64/srclib/apr/misc/os2/randbyte.c deleted file mode 100644 index 4020e31f..00000000 --- a/rubbos/app/httpd-2.0.64/srclib/apr/misc/os2/randbyte.c +++ /dev/null @@ -1,123 +0,0 @@ -/* Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/* The high resolution timer API provides access to the hardware timer - * running at around 1.1MHz. The amount this changes in a time slice is - * varies randomly due to system events, hardware interrupts etc - */ -static UCHAR randbyte_hrtimer() -{ - QWORD t1, t2; - UCHAR byte; - - DosTmrQueryTime(&t1); - DosSleep(5); - DosTmrQueryTime(&t2); - - byte = (t2.ulLo - t1.ulLo) & 0xFF; - byte ^= (t2.ulLo - t1.ulLo) >> 8; - return byte; -} - - - -/* A bunch of system information like memory & process stats. - * Not highly random but every bit helps.... - */ -static UCHAR randbyte_sysinfo() -{ - UCHAR byte = 0; - UCHAR SysVars[100]; - int b; - - DosQuerySysInfo(1, QSV_FOREGROUND_PROCESS, SysVars, sizeof(SysVars)); - - for (b = 0; b < 100; b++) { - byte ^= SysVars[b]; - } - - return byte; -} - - - -/* Similar in concept to randbyte_hrtimer() but accesses the CPU's internal - * counters which run at the CPU's MHz speed. We get separate - * idle / busy / interrupt cycle counts which should provide very good - * randomness due to interference of hardware events. - * This only works on newer CPUs (at least PPro or K6) and newer OS/2 versions - * which is why it's run-time linked. - */ - -static APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1, - ULONG ulParm2, ULONG ulParm3) = NULL; -static HMODULE hDoscalls = 0; -#define CMD_KI_RDCNT (0x63) - -typedef struct _CPUUTIL { - ULONG ulTimeLow; /* Low 32 bits of time stamp */ - ULONG ulTimeHigh; /* High 32 bits of time stamp */ - ULONG ulIdleLow; /* Low 32 bits of idle time */ - ULONG ulIdleHigh; /* High 32 bits of idle time */ - ULONG ulBusyLow; /* Low 32 bits of busy time */ - ULONG ulBusyHigh; /* High 32 bits of busy time */ - ULONG ulIntrLow; /* Low 32 bits of interrupt time */ - ULONG ulIntrHigh; /* High 32 bits of interrupt time */ -} CPUUTIL; - - -static UCHAR randbyte_perf() -{ - UCHAR byte = 0; - CPUUTIL util; - int c; - - if (hDoscalls == 0) { - char failed_module[20]; - ULONG rc; - - rc = DosLoadModule(failed_module, sizeof(failed_module), "DOSCALLS", - &hDoscalls); - - if (rc == 0) { - rc = DosQueryProcAddr(hDoscalls, 976, NULL, (PFN *)&DosPerfSysCall); - - if (rc) { - DosPerfSysCall = NULL; - } - } - } - - if (DosPerfSysCall) { - if (DosPerfSysCall(CMD_KI_RDCNT, (ULONG)&util, 0, 0) == 0) { - for (c = 0; c < sizeof(util); c++) { - byte ^= ((UCHAR *)&util)[c]; - } - } - else { - DosPerfSysCall = NULL; - } - } - - return byte; -} - - - -static UCHAR randbyte() -{ - return randbyte_hrtimer() ^ randbyte_sysinfo() ^ randbyte_perf(); -} |