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doc: bgw_main takes a Datum argument, not void *.

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Per report from James Harper.
This commit is contained in:
Alvaro Herrera 2014-02-27 11:41:43 -03:00
parent 9a57858f11
commit 9b4bd35aa1
1 changed files with 2 additions and 2 deletions
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4
doc/src/sgml/bgworker.sgml
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@ -37,7 +37,7 @@
from its <function>_PG_init()</>.
The structure <structname>BackgroundWorker</structname> is defined thus:
<programlisting>
typedef void (*bgworker_main_type)(void *main_arg);
typedef void (*bgworker_main_type)(Datum main_arg);
typedef struct BackgroundWorker
{
char bgw_name[BGW_MAXLEN];
@ -94,7 +94,7 @@ typedef struct BackgroundWorker
<para>
<structfield>bgw_main</structfield> is a pointer to the function to run when
the process is started. This function must take a single argument of type
<type>void *</> and return <type>void</>.
<type>Datum</> and return <type>void</>.
<structfield>bgw_main_arg</structfield> will be passed to it as its only
argument. Note that the global variable <literal>MyBgworkerEntry</literal>
points to a copy of the <structname>BackgroundWorker</structname> structure