Mercurial > projects > ldc
view lphobos/gc/win32.d @ 1404:11b122f92136
Now that templates instantiations are no longer emitted for all modules that
even blink at them they seem to break due to being linkonce (if compiled with
any optimization level > 0), so let's give them weak linkage instead.
The difference is that unreferenced linkonce symbols can be deleted, while
weak symbols need to be preserved.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Thu, 21 May 2009 15:23:28 +0200 |
parents | 373489eeaf90 |
children |
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// Copyright (C) 2001-2002 by Digital Mars // All Rights Reserved // www.digitalmars.com // Written by Walter Bright import std.c.windows.windows; alias int pthread_t; /*********************************** * Map memory. */ void *os_mem_map(uint nbytes) { return VirtualAlloc(null, nbytes, MEM_RESERVE, PAGE_READWRITE); } /*********************************** * Commit memory. * Returns: * 0 success * !=0 failure */ int os_mem_commit(void *base, uint offset, uint nbytes) { void *p; p = VirtualAlloc(base + offset, nbytes, MEM_COMMIT, PAGE_READWRITE); return cast(int)(p == null); } /*********************************** * Decommit memory. * Returns: * 0 success * !=0 failure */ int os_mem_decommit(void *base, uint offset, uint nbytes) { return cast(int)VirtualFree(base + offset, nbytes, MEM_DECOMMIT) == 0; } /*********************************** * Unmap memory allocated with os_mem_map(). * Memory must have already been decommitted. * Returns: * 0 success * !=0 failure */ int os_mem_unmap(void *base, uint nbytes) { return cast(int)VirtualFree(base, 0, MEM_RELEASE) == 0; } /******************************************** */ pthread_t pthread_self() { //printf("pthread_self() = %x\n", GetCurrentThreadId()); return cast(pthread_t) GetCurrentThreadId(); } /********************************************** * Determine "bottom" of stack (actually the top on Win32 systems). */ void *os_query_stackBottom() { asm { naked ; mov EAX,FS:4 ; ret ; } } /********************************************** * Determine base address and size of static data segment. */ version (GNU) { // This is MinGW specific extern (C) { // TODO: skip the .rdata between .data and .bss? extern int _data_start__; extern int _bss_end__; } void os_query_staticdataseg(void **base, uint *nbytes) { *base = cast(void *)&_data_start__; *nbytes = cast(uint)(cast(char *)&_bss_end__ - cast(char *)&_data_start__); } } else { extern (C) { extern int _xi_a; // &_xi_a just happens to be start of data segment extern int _edata; // &_edata is start of BSS segment extern int _end; // &_end is past end of BSS } void os_query_staticdataseg(void **base, uint *nbytes) { *base = cast(void *)&_xi_a; *nbytes = cast(uint)(cast(char *)&_end - cast(char *)&_xi_a); } } /++++ void os_query_staticdataseg(void **base, uint *nbytes) { static char dummy = 6; SYSTEM_INFO si; MEMORY_BASIC_INFORMATION mbi; char *p; void *bottom = null; uint size = 0; // Tests show the following does not work reliably. // The reason is that the data segment is arbitrarily divided // up into PAGE_READWRITE and PAGE_WRITECOPY. // This means there are multiple regions to query, and // can even wind up including the code segment. assert(0); // fix implementation GetSystemInfo(&si); p = (char *)((uint)(&dummy) & ~(si.dwPageSize - 1)); while (VirtualQuery(p, &mbi, sizeof(mbi)) == sizeof(mbi) && mbi.Protect & (PAGE_READWRITE | PAGE_WRITECOPY) && !(mbi.Protect & PAGE_GUARD) && mbi.AllocationBase != 0) { bottom = (void *)mbi.BaseAddress; size = (uint)mbi.RegionSize; printf("dwPageSize = x%x\n", si.dwPageSize); printf("&dummy = %p\n", &dummy); printf("BaseAddress = %p\n", mbi.BaseAddress); printf("AllocationBase = %p\n", mbi.AllocationBase); printf("AllocationProtect = x%x\n", mbi.AllocationProtect); printf("RegionSize = x%x\n", mbi.RegionSize); printf("State = x%x\n", mbi.State); printf("Protect = x%x\n", mbi.Protect); printf("Type = x%x\n\n", mbi.Type); p -= si.dwPageSize; } *base = bottom; *nbytes = size; } ++++/