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| author | rsc <devnull@localhost> | 2005-01-14 03:45:44 +0000 |
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| committer | rsc <devnull@localhost> | 2005-01-14 03:45:44 +0000 |
| commit | 78e51a8c6678b6e3dff3d619aa786669f531f4bc (patch) | |
| tree | 015e00fde4fc837fd31b705e18d17dc913829388 /man/man3/9p-fid.html | |
| parent | 2634795b5f0053bc0ff08e5d7bbc0eda8efea061 (diff) | |
| download | plan9port-78e51a8c6678b6e3dff3d619aa786669f531f4bc.tar.gz plan9port-78e51a8c6678b6e3dff3d619aa786669f531f4bc.tar.bz2 plan9port-78e51a8c6678b6e3dff3d619aa786669f531f4bc.zip | |
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diff --git a/man/man3/9p-fid.html b/man/man3/9p-fid.html new file mode 100644 index 00000000..44bca53c --- /dev/null +++ b/man/man3/9p-fid.html @@ -0,0 +1,170 @@ +<head> +<title>9p-fid(3) - Plan 9 from User Space</title> +<meta content="text/html; charset=utf-8" http-equiv=Content-Type> +</head> +<body bgcolor=#ffffff> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=10><td> +<tr><td width=20><td> +<tr><td width=20><td><b>9P-FID(3)</b><td align=right><b>9P-FID(3)</b> +<tr><td width=20><td colspan=2> + <br> +<p><font size=+1><b>NAME </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + Fid, Fidpool, allocfidpool, freefidpool, allocfid, closefid, lookupfid, + removefid, Req, Reqpool, allocreqpool, freereqpool, allocreq, + closereq, lookupreq, removereq – 9P fid, request tracking<br> + +</table> +<p><font size=+1><b>SYNOPSIS </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>#include <u.h><br> + #include <libc.h><br> + #include <fcall.h><br> + #include <thread.h><br> + #include <9p.h><br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + typedef struct Fid<br> + {<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + ulong fid;<br> + char omode; /* −1 if not open */<br> + char *uid;<br> + Qid qid;<br> + File *file;<br> + void *aux;<br> + + </table> + </font></tt> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <i>...<br> + </i> + </table> + <tt><font size=+1>} Fid;<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + typedef struct Req<br> + {<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + ulong tag;<br> + Fcall ifcall;<br> + Fcall ofcall;<br> + Req *oldreq;<br> + void *aux;<br> + + </table> + </font></tt> + <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <i>...<br> + </i> + </table> + <tt><font size=+1>} Req;<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Fidpool* allocfidpool(void (*destroy)(Fid*))<br> + void freefidpool(Fidpool *p)<br> + Fid* allocfid(Fidpool *p, ulong fid)<br> + Fid* lookupfid(Fidpool *p, ulong fid)<br> + void closefid(Fid *f)<br> + void removefid(Fid *f)<br> + + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + Reqpool* allocreqpool(void (*destroy)(Req*))<br> + void freereqpool(Reqpool *p)<br> + Req* allocreq(Reqpool *p, ulong tag)<br> + Req* lookupreq(Reqpool *p, ulong tag)<br> + void closereq(Req *f)<br> + void removereq(Req *r)<br> + </font></tt> +</table> +<p><font size=+1><b>DESCRIPTION </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + These routines provide management of <tt><font size=+1>Fid</font></tt> and <tt><font size=+1>Req</font></tt> structures from + <tt><font size=+1>Fidpool</font></tt>s and <tt><font size=+1>Reqpool</font></tt>s. They are primarily used by the 9P server + loop described in <a href="../man3/9p.html"><i>9p</i>(3)</a>. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <tt><font size=+1>Fid</font></tt> structures are intended to represent active fids in a 9P connection, + as <tt><font size=+1>Chan</font></tt> structures do in the Plan 9 kernel. The <tt><font size=+1>fid</font></tt> element is + the integer fid used in the 9P connection. <tt><font size=+1>Omode</font></tt> is the mode under + which the fid was opened, or <tt><font size=+1>−1</font></tt> if this fid has not been opened + yet. Note that in addition to the values <tt><font size=+1>OREAD</font></tt>, + <tt><font size=+1>OWRITE</font></tt>, and <tt><font size=+1>ORDWR</font></tt>, <tt><font size=+1>omode</font></tt> can contain the various flags permissible + in an open call. To ignore the flags, use <tt><font size=+1>omode&OMASK</font></tt>. <tt><font size=+1>Omode</font></tt> should + not be changed by the client. The fid derives from a successful + authentication by <tt><font size=+1>uid</font></tt>. <tt><font size=+1>Qid</font></tt> contains the qid returned in the last + successful <tt><font size=+1>walk</font></tt> or <tt><font size=+1>create</font></tt> transaction + involving the fid. In a file tree-based server, the <tt><font size=+1>Fid</font></tt>’s <tt><font size=+1>file</font></tt> + element points at a <tt><font size=+1>File</font></tt> structure (see <a href="../man3/9p-file.html"><i>9p-file</i>(3)</a>) corresponding + to the fid. The <tt><font size=+1>aux</font></tt> member is intended for use by the client to + hold information specific to a particular <tt><font size=+1>Fid</font></tt>. With the exception + of <tt><font size=+1>aux</font></tt>, these elements should be treated as read-only by + the client. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <i>Allocfidpool</i> creates a new <tt><font size=+1>Fidpool</font></tt>. <i>Freefidpool</i> destroys such + a pool. <i>Allocfid</i> returns a new <tt><font size=+1>Fid</font></tt> whose fid number is <i>fid</i>. There + must not already be an extant <tt><font size=+1>Fid</font></tt> with that number in the pool. + Once a <tt><font size=+1>Fid</font></tt> has been allocated, it can be looked up by fid number + using <i>lookupfid</i>. <tt><font size=+1>Fid</font></tt>s are reference counted: both + <i>allocfid</i> and <i>lookupfid</i> increment the reference count on the <tt><font size=+1>Fid</font></tt> + structure before returning. When a reference to a <tt><font size=+1>Fid</font></tt> is no longer + needed, <i>closefid</i> should be called to note the destruction of the + reference. When the last reference to a <tt><font size=+1>Fid</font></tt> is removed, if <i>destroy</i> + (supplied when creating the fid pool) is not zero, it is + called with the <tt><font size=+1>Fid</font></tt> as a parameter. It should perform whatever + cleanup is necessary regarding the <tt><font size=+1>aux</font></tt> element. <i>Removefid</i> is equivalent + to <i>closefid</i> but also removes the <tt><font size=+1>Fid</font></tt> from the pool. Note that + due to lingering references, the return of <i>removefid</i> may not mean + that <i>destroy</i> has been called. + <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> + + <i>Allocreqpool</i>, <i>freereqpool</i>, <i>allocreq</i>, <i>lookupreq</i>, <i>closereq</i>, and + <i>removereq</i> are analogous but operate on <tt><font size=+1>Reqpool</font></tt>s and <tt><font size=+1>Req</font></tt> structures.<br> + +</table> +<p><font size=+1><b>SOURCE </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <tt><font size=+1>/usr/local/plan9/src/lib9p<br> + </font></tt> +</table> +<p><font size=+1><b>SEE ALSO </b></font><br> + +<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> + + <a href="../man3/9p.html"><i>9p</i>(3)</a>, <a href="../man3/9p-file.html"><i>9p-file</i>(3)</a><br> + +</table> + +<td width=20> +<tr height=20><td> +</table> +<!-- TRAILER --> +<table border=0 cellpadding=0 cellspacing=0 width=100%> +<tr height=15><td width=10><td><td width=10> +<tr><td><td> +<center> +<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a> +</center> +</table> +<!-- TRAILER --> +</body></html> |