Mercurial > projects > ldc
view dmd2/mem.c @ 1047:6bb04dbee21f
Some calling convention work for x86-64:
- Implement x86-64 extern(C), hopefully correctly.
- Tried to be a bit smarter about extern(D) while I was there.
Interestingly, this code seems to be generating more efficient code than
gcc and llvm-gcc in some edge cases, like returning a `{ [7 x i8] }` loaded from
a stack slot from an extern(C) function. (gcc generates 7 1-byte loads, while
this code generates a 4-byte, a 2-byte and a 1-byte load)
I also added some changes to make sure structs being returned from functions or
passed in as parameters are stored in memory where the rest of the backend seems
to expect them to be. These should be removed when support for first-class
aggregates improves.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Fri, 06 Mar 2009 16:00:47 +0100 |
parents | f04dde6e882c |
children | 638d16625da2 |
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/* Copyright (c) 2000 Digital Mars */ /* All Rights Reserved */ #include <cstdio> #include <cstdlib> #include <cstring> #include <cassert> #include "mem.h" #if USE_BOEHM_GC // I needed to perfix the dir after upgrading to gc 7.0 #include "gc/gc.h" #endif /* This implementation of the storage allocator uses the standard C allocation package. */ Mem mem; #if USE_BOEHM_GC static bool gc_was_init = false; void Mem::init() { GC_init(); gc_was_init = true; } char *Mem::strdup(const char *s) { char *p; if (s) { p = GC_strdup(s); if (p) return p; error(); } return NULL; } void *Mem::malloc(size_t size) { void *p; if (!size) p = NULL; else { p = GC_malloc(size); if (!p) error(); } return p; } void *Mem::calloc(size_t size, size_t n) { void *p; if (!size || !n) p = NULL; else { p = GC_malloc(size * n); if (!p) error(); memset(p, 0, size * n); } return p; } void *Mem::realloc(void *p, size_t size) { if (!size) { if (p) { GC_free(p); p = NULL; } } else if (!p) { p = GC_malloc(size); if (!p) error(); } else { p = GC_realloc(p, size); if (!p) error(); } return p; } void Mem::free(void *p) { if (p) GC_free(p); } void *Mem::mallocdup(void *o, size_t size) { void *p; if (!size) p = NULL; else { p = GC_malloc(size); if (!p) error(); else memcpy(p,o,size); } return p; } void Mem::error() { printf("Error: out of memory\n"); exit(EXIT_FAILURE); } void Mem::fullcollect() { GC_gcollect(); } void Mem::mark(void *pointer) { (void) pointer; // necessary for VC /W4 } /* =================================================== */ void * operator new(size_t m_size) { // without this we segfault with gc 7.0 if (!gc_was_init) { mem.init(); } void *p = GC_malloc(m_size); if (p) return p; printf("Error: out of memory\n"); exit(EXIT_FAILURE); return p; } void operator delete(void *p) { GC_free(p); } #elif !USE_BOEHM_GC void Mem::init() { } char *Mem::strdup(const char *s) { char *p; if (s) { p = ::strdup(s); if (p) return p; error(); } return NULL; } void *Mem::malloc(size_t size) { void *p; if (!size) p = NULL; else { p = ::malloc(size); if (!p) error(); } return p; } void *Mem::calloc(size_t size, size_t n) { void *p; if (!size || !n) p = NULL; else { p = ::malloc(size * n); if (!p) error(); memset(p, 0, size * n); } return p; } void *Mem::realloc(void *p, size_t size) { if (!size) { if (p) { ::free(p); p = NULL; } } else if (!p) { p = ::malloc(size); if (!p) error(); } else { p = ::realloc(p, size); if (!p) error(); } return p; } void Mem::free(void *p) { if (p) ::free(p); } void *Mem::mallocdup(void *o, size_t size) { void *p; if (!size) p = NULL; else { p = ::malloc(size); if (!p) error(); else memcpy(p,o,size); } return p; } void Mem::error() { printf("Error: out of memory\n"); exit(EXIT_FAILURE); } void Mem::fullcollect() { } void Mem::mark(void *pointer) { } #endif // USE_BOEHM_GC