database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-08 11:42:09 +03:00
Code Activity

Ensure SIZE_MAX can be used throughout our code.

Browse Source 
Pre-C99 platforms may lack <stdint.h> and thereby SIZE_MAX.  We have
a couple of places using the hack "(size_t) -1" as a fallback, but
it wasn't universally available; which means the code added in commit
2e70d6b5e fails to compile everywhere.  Move that hack to c.h so that
we can rely on having SIZE_MAX everywhere.

Per discussion, it'd be a good idea to make the macro's value safe
for use in #if-tests, but that will take a bit more work.  This is
just a quick expedient to get the buildfarm green again.

Back-patch to all supported branches, like the previous commit.

Discussion: https://postgr.es/m/15883.1504278595@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2017-09-01 13:52:53 -04:00
parent 84be67181a
commit b79d69b087
3 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/include/utils/memutils.h
View File

@ -41,7 +41,7 @@
#define AllocSizeIsValid(size) ((Size) (size) <= MaxAllocSize)
#define MaxAllocHugeSize ((Size) -1 >> 1) /* SIZE_MAX / 2 */
#define MaxAllocHugeSize (SIZE_MAX / 2)
#define AllocHugeSizeIsValid(size) ((Size) (size) <= MaxAllocHugeSize)