diff options
Diffstat (limited to 'ghc/includes/Constants.h')
| -rw-r--r-- | ghc/includes/Constants.h | 25 |
1 files changed, 4 insertions, 21 deletions
diff --git a/ghc/includes/Constants.h b/ghc/includes/Constants.h index d02ae4d699..4f3c35b744 100644 --- a/ghc/includes/Constants.h +++ b/ghc/includes/Constants.h @@ -20,29 +20,12 @@ /* ----------------------------------------------------------------------------- Minimum closure sizes - Here we define the minimum size for updatable closures. All updates - will be performed on closures of this size. For non-updatable closures - the minimum size is 1 to allow for a forwarding pointer. - - When we used to keep the mutable list threaded through closures on - the heap, MIN_UPD_SIZE used to be 2. Now it's 1. - - o MIN_UPD_SIZE doesn't apply to stack closures, static closures - or non-updateable objects like PAPs or CONSTRs - o MIN_UPD_SIZE is big enough to contain any of the following: - o EVACUATED - o BLACKHOLE - o BLOCKING QUEUE - o IND, IND_PERM, IND_OLDGEN and IND_OLDGEN_PERM - (it need not be big enough for IND_STATIC - but it is) - o MIN_NONUPD_SIZE doesn't apply to stack closures, static closures - or updateable objects like APs, THUNKS or THUNK_SELECTORs - o MIN_NONUPD_SIZE is big enough to contain any of the following: - o EVACUATED + This is the minimum number of words in the payload of a + heap-allocated closure, so that the closure has enough room to be + overwritten with a forwarding pointer during garbage collection. -------------------------------------------------------------------------- */ -#define MIN_UPD_SIZE 1 -#define MIN_NONUPD_SIZE 1 +#define MIN_PAYLOAD_SIZE 1 /* ----------------------------------------------------------------------------- Constants to do with specialised closure types. |