diff options
| author | Peter Eisentraut | 2021-11-22 06:40:17 +0000 |
|---|---|---|
| committer | Peter Eisentraut | 2021-11-22 07:00:14 +0000 |
| commit | d6d1dfcc99e3dd6e70e2a7024924e491bb7a9670 (patch) | |
| tree | 6fef3affc3f8e081be88963d4ccb677f8909486b /src/include/fmgr.h | |
| parent | 1b06d7bac901e5fd20bba597188bae2882bf954b (diff) | |
Add ABI extra field to fmgr magic block
This allows derived products to intentionally make their fmgr ABI
incompatible, with a clean error message.
Discussion: https://www.postgresql.org/message-id/flat/55215fda-db31-a045-d6b7-d6f2d2dc9920%40enterprisedb.com
Diffstat (limited to 'src/include/fmgr.h')
| -rw-r--r-- | src/include/fmgr.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/include/fmgr.h b/src/include/fmgr.h index ab7b85c86e1..cec663bdff0 100644 --- a/src/include/fmgr.h +++ b/src/include/fmgr.h @@ -458,6 +458,7 @@ typedef struct int indexmaxkeys; /* INDEX_MAX_KEYS */ int namedatalen; /* NAMEDATALEN */ int float8byval; /* FLOAT8PASSBYVAL */ + char abi_extra[32]; /* see pg_config_manual.h */ } Pg_magic_struct; /* The actual data block contents */ @@ -468,9 +469,13 @@ typedef struct FUNC_MAX_ARGS, \ INDEX_MAX_KEYS, \ NAMEDATALEN, \ - FLOAT8PASSBYVAL \ + FLOAT8PASSBYVAL, \ + FMGR_ABI_EXTRA, \ } +StaticAssertDecl(sizeof(FMGR_ABI_EXTRA) <= sizeof(((Pg_magic_struct*)0)->abi_extra), + "FMGR_ABI_EXTRA too long"); + /* * Declare the module magic function. It needs to be a function as the dlsym * in the backend is only guaranteed to work on functions, not data |