summaryrefslogtreecommitdiff
path: root/gnu/usr.bin/perl/win32/win32.c
diff options
context:
space:
mode:
authorTodd C. Miller <millert@cvs.openbsd.org>2005-01-15 21:30:44 +0000
committerTodd C. Miller <millert@cvs.openbsd.org>2005-01-15 21:30:44 +0000
commitc2276cd9a1ad823a3a292bd9ea5d0475bb983737 (patch)
treed3828d43e8271c783c6683783ad627b4232d3672 /gnu/usr.bin/perl/win32/win32.c
parentc30a36e0c140753f3f773b400f5dbc777b344b8a (diff)
sync in-tree perl with 5.8.6
Diffstat (limited to 'gnu/usr.bin/perl/win32/win32.c')
-rw-r--r--gnu/usr.bin/perl/win32/win32.c47
1 files changed, 34 insertions, 13 deletions
diff --git a/gnu/usr.bin/perl/win32/win32.c b/gnu/usr.bin/perl/win32/win32.c
index 23e9e7f5386..b01e46a9fed 100644
--- a/gnu/usr.bin/perl/win32/win32.c
+++ b/gnu/usr.bin/perl/win32/win32.c
@@ -4155,7 +4155,6 @@ static char *base = NULL; /* XXX threadead */
static char *reserved = NULL; /* XXX threadead */
static char *brk = NULL; /* XXX threadead */
static DWORD pagesize = 0; /* XXX threadead */
-static DWORD allocsize = 0; /* XXX threadead */
void *
sbrk(ptrdiff_t need)
@@ -4168,28 +4167,34 @@ sbrk(ptrdiff_t need)
* call the OS to commit just one page ...
*/
pagesize = info.dwPageSize << 3;
- allocsize = info.dwAllocationGranularity;
}
- /* This scheme fails eventually if request for contiguous
- * block is denied so reserve big blocks - this is only
- * address space not memory ...
- */
if (brk+need >= reserved)
{
- DWORD size = 64*1024*1024;
+ DWORD size = brk+need-reserved;
char *addr;
+ char *prev_committed = NULL;
if (committed && reserved && committed < reserved)
{
/* Commit last of previous chunk cannot span allocations */
addr = (char *) VirtualAlloc(committed,reserved-committed,MEM_COMMIT,PAGE_READWRITE);
if (addr)
+ {
+ /* Remember where we committed from in case we want to decommit later */
+ prev_committed = committed;
committed = reserved;
+ }
}
/* Reserve some (more) space
+ * Contiguous blocks give us greater efficiency, so reserve big blocks -
+ * this is only address space not memory...
* Note this is a little sneaky, 1st call passes NULL as reserved
* so lets system choose where we start, subsequent calls pass
* the old end address so ask for a contiguous block
*/
+sbrk_reserve:
+ if (size < 64*1024*1024)
+ size = 64*1024*1024;
+ size = ((size + pagesize - 1) / pagesize) * pagesize;
addr = (char *) VirtualAlloc(reserved,size,MEM_RESERVE,PAGE_NOACCESS);
if (addr)
{
@@ -4201,6 +4206,19 @@ sbrk(ptrdiff_t need)
if (!brk)
brk = committed;
}
+ else if (reserved)
+ {
+ /* The existing block could not be extended far enough, so decommit
+ * anything that was just committed above and start anew */
+ if (prev_committed)
+ {
+ if (!VirtualFree(prev_committed,reserved-prev_committed,MEM_DECOMMIT))
+ return (void *) -1;
+ }
+ reserved = base = committed = brk = NULL;
+ size = need;
+ goto sbrk_reserve;
+ }
else
{
return (void *) -1;
@@ -4211,11 +4229,12 @@ sbrk(ptrdiff_t need)
if (brk > committed)
{
DWORD size = ((brk-committed + pagesize -1)/pagesize) * pagesize;
- char *addr = (char *) VirtualAlloc(committed,size,MEM_COMMIT,PAGE_READWRITE);
+ char *addr;
+ if (committed+size > reserved)
+ size = reserved-committed;
+ addr = (char *) VirtualAlloc(committed,size,MEM_COMMIT,PAGE_READWRITE);
if (addr)
- {
- committed += size;
- }
+ committed += size;
else
return (void *) -1;
}
@@ -4807,13 +4826,15 @@ XS(w32_GetFullPathName)
SV *fullpath;
char *filepart;
DWORD len;
+ STRLEN filename_len;
+ char *filename_p;
if (items != 1)
Perl_croak(aTHX_ "usage: Win32::GetFullPathName($filename)");
filename = ST(0);
- fullpath = sv_mortalcopy(filename);
- SvUPGRADE(fullpath, SVt_PV);
+ filename_p = SvPV(filename, filename_len);
+ fullpath = sv_2mortal(newSVpvn(filename_p, filename_len));
if (!SvPVX(fullpath) || !SvLEN(fullpath))
XSRETURN_UNDEF;