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Use U3_OS_LoomBits To Set Reserved Memory Size

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The size and starting position of Urbit's reserved memory block is set by `U3_OS_LoomBits` and `U3_OS_LoomBase` in `include/c/portable.h`.

`U3_OS_LoomBase` is referenced in `include/noun/allocate.h` and sets the position in memory of u3_Loom.  This is good.

However, `U3_OS_LoomBits` is not actually used to set the size of the reserved memory block.  Instead:

in `include/allocate.h`,
 - `u3a_bits` is defined
 - `u3a_bits` → `u3a_bytes`
 
in `noun/manage.c`, 
 - `u3a_bytes` → `len_w` in `_cm_init()`
 - `len_w` sets the reserved memory block size

This proposal puts `U3_OS_LoomBits` back to work by defining `u3a_bits` with it.
This commit is contained in:
Brandon Curtis 2016-08-19 04:55:06 -07:00 committed by GitHub
parent 0c3ec4c7fd
commit 5e9f4470c7
1 changed files with 1 additions and 1 deletions
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2
include/noun/allocate.h
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@ -23,7 +23,7 @@
**/
/* u3a_bits: number of bits in word-addressed pointer. 29 == 2GB.
*/
# define u3a_bits 29
# define u3a_bits U3_OS_LoomBits
/* u3a_page: number of bits in word-addressed page. 12 == 16Kbyte page.
*/