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| author | Carl Shapiro <cshapiro@google.com> | 2010-02-14 19:01:31 -0800 |
|---|---|---|
| committer | Carl Shapiro <cshapiro@google.com> | 2010-02-16 14:37:43 -0800 |
| commit | b99a099cad7066274b25de9d603e7ced37d20e19 (patch) | |
| tree | 88f8aa4374f279dd5f2016ac4eb3158d14f958b4 /libcutils/mspace.c | |
| parent | 63b396d89c3a535675808282e2563ecabc04ef76 (diff) | |
| download | system_core-b99a099cad7066274b25de9d603e7ced37d20e19.tar.gz system_core-b99a099cad7066274b25de9d603e7ced37d20e19.tar.bz2 system_core-b99a099cad7066274b25de9d603e7ced37d20e19.zip | |
Add a new method to export the extent of the break, akin to return
value of sbrk(0) in UNIX. In terms of dlmalloc and our proprietary
contiguous mspace class, this is the highest address returned by its
morecore method.
Diffstat (limited to 'libcutils/mspace.c')
| -rw-r--r-- | libcutils/mspace.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libcutils/mspace.c b/libcutils/mspace.c index 63b199d5..6d3b35c8 100644 --- a/libcutils/mspace.c +++ b/libcutils/mspace.c @@ -271,4 +271,16 @@ size_t destroy_contiguous_mspace(mspace msp) { } return 0; } + +void *contiguous_mspace_sbrk0(mspace msp) { + struct mspace_contig_state *cs; + mstate ms; + const unsigned int pagesize = PAGESIZE; + + ms = (mstate)msp; + cs = (struct mspace_contig_state *)((uintptr_t)ms & ~(pagesize-1)); + assert(cs->magic == CONTIG_STATE_MAGIC); + assert(cs->m == ms); + return cs->brk; +} #endif |