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diff --git a/manual/PortabilityIssues.html b/manual/PortabilityIssues.html new file mode 100644 index 0000000..e828ae3 --- /dev/null +++ b/manual/PortabilityIssues.html @@ -0,0 +1,718 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<HTML> +<HEAD> + <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8"> + <TITLE>PORTABILITYISSUES manual page</TITLE> + <META NAME="GENERATOR" CONTENT="OpenOffice.org 1.1.3 (Linux)"> + <META NAME="CREATED" CONTENT="20050505;322600"> + <META NAME="CHANGED" CONTENT="20050506;11312700"> + <!-- manual page source format generated by PolyglotMan v3.2, --> + <!-- available at http://polyglotman.sourceforge.net/ --> +</HEAD> +<BODY LANG="en-GB" BGCOLOR="#ffffff" DIR="LTR"> +<P><A HREF="#toc">Table of Contents</A></P> +<H2><A HREF="#toc0" NAME="sect0">Name</A></H2> +<P STYLE="font-weight: medium">Portability issues</P> +<H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> +<P><B>Thread priority</B></P> +<H2><A HREF="#toc2" NAME="sect2">Description</A></H2> +<P><B>Thread priority</B></P> +<P STYLE="margin-left: 2cm">POSIX defines a single contiguous range +of numbers that determine a thread's priority. Win32 defines priority +classes - and priority levels relative to these classes. Classes are +simply priority base levels that the defined priority levels are +relative to such that, changing a process's priority class will +change the priority of all of it's threads, while the threads retain +the same relativity to each other.</P> +<P STYLE="margin-left: 2cm">A Win32 system defines a single +contiguous monotonic range of values that define system priority +levels, just like POSIX. However, Win32 restricts individual threads +to a subset of this range on a per-process basis.</P> +<P STYLE="margin-left: 2cm">The following table shows the base +priority levels for combinations of priority class and priority value +in Win32.</P> +<DL> + <DL> + <DD> + <TABLE WIDTH=742 BORDER=0 CELLPADDING=0 CELLSPACING=0 STYLE="page-break-inside: avoid"> + <COL WIDTH=50> + <COL WIDTH=356> + <COL WIDTH=336> + <THEAD> + <TR VALIGN=TOP> + <TD WIDTH=50> + <P ALIGN=CENTER><BR> + </P> + </TD> + <TD WIDTH=356> + <P ALIGN=LEFT><B>Process Priority Class</B></P> + </TD> + <TD WIDTH=336> + <P ALIGN=LEFT><B>Thread Priority Level</B></P> + </TD> + </TR> + </THEAD> + <TBODY> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="1" SDNUM="3081;"> + <P ALIGN=CENTER>1</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_IDLE</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="1" SDNUM="3081;"> + <P ALIGN=CENTER>1</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_IDLE</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="1" SDNUM="3081;"> + <P ALIGN=CENTER>1</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_IDLE</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="1" SDNUM="3081;"> + <P ALIGN=CENTER>1</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_IDLE</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="1" SDNUM="3081;"> + <P ALIGN=CENTER>1</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_IDLE</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="2" SDNUM="3081;"> + <P ALIGN=CENTER>2</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="3" SDNUM="3081;"> + <P ALIGN=CENTER>3</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="4" SDNUM="3081;"> + <P ALIGN=CENTER>4</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="4" SDNUM="3081;"> + <P ALIGN=CENTER>4</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="5" SDNUM="3081;"> + <P ALIGN=CENTER>5</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="5" SDNUM="3081;"> + <P ALIGN=CENTER>5</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="5" SDNUM="3081;"> + <P ALIGN=CENTER>5</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Background NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="6" SDNUM="3081;"> + <P ALIGN=CENTER>6</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="6" SDNUM="3081;"> + <P ALIGN=CENTER>6</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="6" SDNUM="3081;"> + <P ALIGN=CENTER>6</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Background NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="7" SDNUM="3081;"> + <P ALIGN=CENTER>7</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="7" SDNUM="3081;"> + <P ALIGN=CENTER>7</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Background NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="7" SDNUM="3081;"> + <P ALIGN=CENTER>7</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Foreground NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="8" SDNUM="3081;"> + <P ALIGN=CENTER>8</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="8" SDNUM="3081;"> + <P ALIGN=CENTER>8</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="8" SDNUM="3081;"> + <P ALIGN=CENTER>8</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Foreground NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="8" SDNUM="3081;"> + <P ALIGN=CENTER>8</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="9" SDNUM="3081;"> + <P ALIGN=CENTER>9</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="9" SDNUM="3081;"> + <P ALIGN=CENTER>9</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Foreground NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="9" SDNUM="3081;"> + <P ALIGN=CENTER>9</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="10" SDNUM="3081;"> + <P ALIGN=CENTER>10</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Foreground NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="10" SDNUM="3081;"> + <P ALIGN=CENTER>10</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="11" SDNUM="3081;"> + <P ALIGN=CENTER>11</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>Foreground NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="11" SDNUM="3081;"> + <P ALIGN=CENTER>11</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="11" SDNUM="3081;"> + <P ALIGN=CENTER>11</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="12" SDNUM="3081;"> + <P ALIGN=CENTER>12</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="12" SDNUM="3081;"> + <P ALIGN=CENTER>12</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="13" SDNUM="3081;"> + <P ALIGN=CENTER>13</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="14" SDNUM="3081;"> + <P ALIGN=CENTER>14</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="15" SDNUM="3081;"> + <P ALIGN=CENTER>15</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="15" SDNUM="3081;"> + <P ALIGN=CENTER>15</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>HIGH_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_TIME_CRITICAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="15" SDNUM="3081;"> + <P ALIGN=CENTER>15</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>IDLE_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_TIME_CRITICAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="15" SDNUM="3081;"> + <P ALIGN=CENTER>15</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>BELOW_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_TIME_CRITICAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="15" SDNUM="3081;"> + <P ALIGN=CENTER>15</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_TIME_CRITICAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="15" SDNUM="3081;"> + <P ALIGN=CENTER>15</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>ABOVE_NORMAL_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_TIME_CRITICAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="16" SDNUM="3081;"> + <P ALIGN=CENTER>16</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_IDLE</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="17" SDNUM="3081;"> + <P ALIGN=CENTER>17</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="-7" SDNUM="3081;"> + <P ALIGN=LEFT>-7</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="18" SDNUM="3081;"> + <P ALIGN=CENTER>18</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="-6" SDNUM="3081;"> + <P ALIGN=LEFT>-6</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="19" SDNUM="3081;"> + <P ALIGN=CENTER>19</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="-5" SDNUM="3081;"> + <P ALIGN=LEFT>-5</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="20" SDNUM="3081;"> + <P ALIGN=CENTER>20</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="-4" SDNUM="3081;"> + <P ALIGN=LEFT>-4</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="21" SDNUM="3081;"> + <P ALIGN=CENTER>21</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="-3" SDNUM="3081;"> + <P ALIGN=LEFT>-3</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="22" SDNUM="3081;"> + <P ALIGN=CENTER>22</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_LOWEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="23" SDNUM="3081;"> + <P ALIGN=CENTER>23</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_BELOW_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="24" SDNUM="3081;"> + <P ALIGN=CENTER>24</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="25" SDNUM="3081;"> + <P ALIGN=CENTER>25</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_ABOVE_NORMAL</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="26" SDNUM="3081;"> + <P ALIGN=CENTER>26</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_HIGHEST</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="27" SDNUM="3081;"> + <P ALIGN=CENTER>27</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="3" SDNUM="3081;"> + <P ALIGN=LEFT>3</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="28" SDNUM="3081;"> + <P ALIGN=CENTER>28</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="4" SDNUM="3081;"> + <P ALIGN=LEFT>4</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="29" SDNUM="3081;"> + <P ALIGN=CENTER>29</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="5" SDNUM="3081;"> + <P ALIGN=LEFT>5</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="30" SDNUM="3081;"> + <P ALIGN=CENTER>30</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=BOTTOM SDVAL="6" SDNUM="3081;"> + <P ALIGN=LEFT>6</P> + </TD> + </TR> + <TR> + <TD WIDTH=50 VALIGN=BOTTOM SDVAL="31" SDNUM="3081;"> + <P ALIGN=CENTER>31</P> + </TD> + <TD WIDTH=356 VALIGN=TOP> + <P ALIGN=LEFT>REALTIME_PRIORITY_CLASS</P> + </TD> + <TD WIDTH=336 VALIGN=TOP> + <P ALIGN=LEFT>THREAD_PRIORITY_TIME_CRITICAL</P> + </TD> + </TR> + </TBODY> + </TABLE> + </DL> +</DL> +<P STYLE="margin-left: 2cm">Windows NT: Values -7, -6, -5, -4, -3, 3, +4, 5, and 6 are not supported.</P> +<P STYLE="margin-left: 2cm">As you can see, the real priority levels +available to any individual Win32 thread are non-contiguous.</P> +<P STYLE="margin-left: 2cm">An application using Pthreads-w32 should +not make assumptions about the numbers used to represent thread +priority levels, except that they are monotonic between the values +returned by sched_get_priority_min() and sched_get_priority_max(). +E.g. Windows 95, 98, NT, 2000, XP make available a non-contiguous +range of numbers between -15 and 15, while at least one version of +WinCE (3.0) defines the minimum priority (THREAD_PRIORITY_LOWEST) as +5, and the maximum priority (THREAD_PRIORITY_HIGHEST) as 1.</P> +<P STYLE="margin-left: 2cm">Internally, pthreads-win32 maps any +priority levels between THREAD_PRIORITY_IDLE and +THREAD_PRIORITY_LOWEST to THREAD_PRIORITY_LOWEST, or between +THREAD_PRIORITY_TIME_CRITICAL and THREAD_PRIORITY_HIGHEST to +THREAD_PRIORITY_HIGHEST. Currently, this also applies to +REALTIME_PRIORITY_CLASS even if levels -7, -6, -5, -4, -3, 3, 4, 5, +and 6 are supported.</P> +<P STYLE="margin-left: 2cm">If it wishes, a Win32 application using +pthreads-w32 can use the Win32 defined priority macros +THREAD_PRIORITY_IDLE through THREAD_PRIORITY_TIME_CRITICAL.</P> +<H2><A HREF="#toc3" NAME="sect3">Author</A></H2> +<P>Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A>.</P> +<H2><A HREF="#toc4" NAME="sect4">See also</A></H2> +<P><BR><BR> +</P> +<HR> +<P><A NAME="toc"></A><B>Table of Contents</B></P> +<UL> + <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect0" NAME="toc0">Name</A> + </P> + <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect1" NAME="toc1">Synopsis</A> + </P> + <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect2" NAME="toc2">Description</A> + </P> + <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect3" NAME="toc3">Author</A> + </P> + <LI><P><A HREF="#sect4" NAME="toc4">See also</A> + </P> +</UL> +</BODY> +</HTML>
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