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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/include/alloca.h | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.xz glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/include/alloca.h')
-rw-r--r-- | REORG.TODO/include/alloca.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/REORG.TODO/include/alloca.h b/REORG.TODO/include/alloca.h new file mode 100644 index 0000000000..fd90664f0a --- /dev/null +++ b/REORG.TODO/include/alloca.h @@ -0,0 +1,80 @@ +#ifndef _ALLOCA_H + +#include <stdlib/alloca.h> + +# ifndef _ISOMAC + +#include <stackinfo.h> + +#undef __alloca + +/* Now define the internal interfaces. */ +extern void *__alloca (size_t __size); + +#ifdef __GNUC__ +# define __alloca(size) __builtin_alloca (size) +#endif /* GCC. */ + +extern int __libc_use_alloca (size_t size) __attribute__ ((const)); +extern int __libc_alloca_cutoff (size_t size) __attribute__ ((const)); +libc_hidden_proto (__libc_alloca_cutoff) + +#define __MAX_ALLOCA_CUTOFF 65536 + +#include <allocalim.h> + +#ifndef stackinfo_alloca_round +# define stackinfo_alloca_round(l) (((l) + 15) & -16) +#endif + +#if _STACK_GROWS_DOWN +# define extend_alloca(buf, len, newlen) \ + (__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \ + char *__newbuf = __alloca (__newlen); \ + if (__newbuf + __newlen == (char *) (buf)) \ + len += __newlen; \ + else \ + len = __newlen; \ + __newbuf; }) +#elif _STACK_GROWS_UP +# define extend_alloca(buf, len, newlen) \ + (__typeof (buf)) ({ size_t __newlen = stackinfo_alloca_round (newlen); \ + char *__newbuf = __alloca (__newlen); \ + char *__buf = (char *) (buf); \ + if (__buf + len == __newbuf) \ + { \ + len += __newlen; \ + __newbuf = __buf; \ + } \ + else \ + len = __newlen; \ + __newbuf; }) +#else +# define extend_alloca(buf, len, newlen) \ + __alloca (((len) = (newlen))) +#endif + +#if defined stackinfo_get_sp && defined stackinfo_sub_sp +# define alloca_account(size, avar) \ + ({ void *old__ = stackinfo_get_sp (); \ + void *m__ = __alloca (size); \ + avar += stackinfo_sub_sp (old__); \ + m__; }) +# define extend_alloca_account(buf, len, newlen, avar) \ + ({ void *old__ = stackinfo_get_sp (); \ + void *m__ = extend_alloca (buf, len, newlen); \ + avar += stackinfo_sub_sp (old__); \ + m__; }) +#else +# define alloca_account(size, avar) \ + ({ size_t s__ = (size); \ + avar += s__; \ + __alloca (s__); }) +# define extend_alloca_account(buf, len, newlen, avar) \ + ({ size_t s__ = (newlen); \ + avar += s__; \ + extend_alloca (buf, len, s__); }) +#endif + +# endif /* !_ISOMAC */ +#endif |