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Autoconfiscate selection of 64-bit int type for 64-bit large object API.

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Get rid of the fundamentally indefensible assumption that "long long int"
exists and is exactly 64 bits wide on every platform Postgres runs on.
Instead let the configure script select the type to use for "pg_int64".

This is a bit of a pain in the rear since we do not want to pollute client
namespace with all the random symbols that pg_config.h defines; instead
we have to create a separate generated header file, "pg_config_ext.h".
But now that the infrastructure is there, we might have the ability to
add some other stuff that's long been wanting in this area.
This commit is contained in:
Tom Lane
2012-10-07 21:52:07 -04:00
parent ea72bb8ae5
commit 95d035e66d
22 changed files with 130 additions and 66 deletions
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13
src/include/storage/large_object.h
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@@ -62,10 +62,13 @@ typedef struct LargeObjectDesc
* This avoids unnecessary tuple updates caused by partial-page writes.
*/
#define LOBLKSIZE (BLCKSZ / 4)
/*
* Maximum byte length for each large object
*/
#define MAX_LARGE_OBJECT_SIZE ((int64)INT_MAX * LOBLKSIZE)
* Maximum length in bytes for a large object. To make this larger, we'd
* have to widen pg_largeobject.pageno as well as various internal variables.
*/
#define MAX_LARGE_OBJECT_SIZE ((int64) INT_MAX * LOBLKSIZE)
/*
* Function definitions...
@@ -77,8 +80,8 @@ extern Oid inv_create(Oid lobjId);
extern LargeObjectDesc *inv_open(Oid lobjId, int flags, MemoryContext mcxt);
extern void inv_close(LargeObjectDesc *obj_desc);
extern int inv_drop(Oid lobjId);
extern int64 inv_seek(LargeObjectDesc *obj_desc, int64 offset, int whence);
extern int64 inv_tell(LargeObjectDesc *obj_desc);
extern int64 inv_seek(LargeObjectDesc *obj_desc, int64 offset, int whence);
extern int64 inv_tell(LargeObjectDesc *obj_desc);
extern int inv_read(LargeObjectDesc *obj_desc, char *buf, int nbytes);
extern int inv_write(LargeObjectDesc *obj_desc, const char *buf, int nbytes);
extern void inv_truncate(LargeObjectDesc *obj_desc, int64 len);