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comparison packages/services/memalloc/common/current/src/dlmalloc.cxx @ 1687:eb235374a7ae

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2004-06-24 Oyvind Harboe <oyvind.harboe@zylin.com> * Added cyg_memalloc_alloc_fail() fn which is invoked before return NULL from failed allocations. Useful breakpoint site. Andrew Lunn wrote some of the code and pointed out various wrinkles to be ironed out.
author asl
date Mon, 05 Jul 2004 11:07:04 +0000
parents 28c8c2fbb86e
children
comparison
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1686:961151dc048e 1687:eb235374a7ae
213 #include <pkgconf/infra.h> // CYGDBG_USE_ASSERTS 213 #include <pkgconf/infra.h> // CYGDBG_USE_ASSERTS
214 #include <cyg/infra/cyg_type.h> // types 214 #include <cyg/infra/cyg_type.h> // types
215 #include <cyg/infra/cyg_ass.h> // assertions 215 #include <cyg/infra/cyg_ass.h> // assertions
216 #include <stddef.h> // for size_t 216 #include <stddef.h> // for size_t
217 #include <cyg/memalloc/dlmalloc.hxx> 217 #include <cyg/memalloc/dlmalloc.hxx>
218 //#include <cyg/infra/diag.h>
219 218
220 /* 219 /*
221 Debugging: 220 Debugging:
222 221
223 Because freed chunks may be overwritten with link fields, this 222 Because freed chunks may be overwritten with link fields, this
1271 if (chunksize(top) < nb || remainder_size < (long)MINSIZE) 1270 if (chunksize(top) < nb || remainder_size < (long)MINSIZE)
1272 { 1271 {
1273 //diag_printf("chunksize(top)=%ld, nb=%d, remainder=%ld\n", chunksize(top), 1272 //diag_printf("chunksize(top)=%ld, nb=%d, remainder=%ld\n", chunksize(top),
1274 // nb, remainder_size); 1273 // nb, remainder_size);
1275 MALLOC_UNLOCK; 1274 MALLOC_UNLOCK;
1275 CYG_MEMALLOC_FAIL(bytes);
1276 return NULL; /* propagate failure */ 1276 return NULL; /* propagate failure */
1277 } 1277 }
1278 1278
1279 victim = top; 1279 victim = top;
1280 set_head(victim, nb | PREV_INUSE); 1280 set_head(victim, nb | PREV_INUSE);
1556 } 1556 }
1557 } 1557 }
1558 1558
1559 // couldn't resize the allocation any direction, so return failure 1559 // couldn't resize the allocation any direction, so return failure
1560 MALLOC_UNLOCK; 1560 MALLOC_UNLOCK;
1561 CYG_MEMALLOC_FAIL(bytes);
1561 return NULL; 1562 return NULL;
1562 } 1563 }
1563 1564
1564 1565
1565 split: /* split off extra room in old or expanded chunk */ 1566 split: /* split off extra room in old or expanded chunk */