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libpq-fe.h: Don't claim SOCKTYPE in the global namespace

The definition of PGoauthBearerRequest uses a temporary SOCKTYPE macro
to hide the difference between Windows and Berkeley socket handles,
since we don't surface pgsocket in our public API. This macro doesn't
need to escape the header, because implementers will choose the correct
socket type based on their platform, so I #undef'd it immediately after
use.

I didn't namespace that helper, though, so if anyone else needs a
SOCKTYPE macro, libpq-fe.h will now unhelpfully get rid of it. This
doesn't seem too far-fetched, given its proximity to existing POSIX
macro names.

Add a PQ_ prefix to avoid collisions, update and improve the surrounding
documentation, and backpatch.

Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAOYmi%2BmrGg%2Bn_X2MOLgeWcj3v_M00gR8uz_D7mM8z%3DdX1JYVbg%40mail.gmail.com
Backpatch-through: 18
This commit is contained in:
Jacob Champion
2025-12-17 11:45:52 -08:00
parent 5b4fb2b97d
commit 8b217c96ea
2 changed files with 19 additions and 8 deletions

View File

@@ -10422,10 +10422,14 @@ typedef struct PGoauthBearerRequest
/* Hook outputs */
/* Callback implementing a custom asynchronous OAuth flow. */
/*
* Callback implementing a custom asynchronous OAuth flow. The signature is
* platform-dependent: PQ_SOCKTYPE is SOCKET on Windows, and int everywhere
* else.
*/
PostgresPollingStatusType (*async) (PGconn *conn,
struct PGoauthBearerRequest *request,
SOCKTYPE *altsock);
PQ_SOCKTYPE *altsock);
/* Callback to clean up custom allocations. */
void (*cleanup) (PGconn *conn, struct PGoauthBearerRequest *request);
@@ -10482,7 +10486,7 @@ typedef struct PGoauthBearerRequest
hook. When the callback cannot make further progress without blocking,
it should return either <symbol>PGRES_POLLING_READING</symbol> or
<symbol>PGRES_POLLING_WRITING</symbol> after setting
<literal>*pgsocket</literal> to the file descriptor that will be marked
<literal>*altsock</literal> to the file descriptor that will be marked
ready to read/write when progress can be made again. (This descriptor
is then provided to the top-level polling loop via
<function>PQsocket()</function>.) Return <symbol>PGRES_POLLING_OK</symbol>