ldc/gen/pragma.h
kai 4ea7e8dbf8 Add pragma to install function as global C runtime ctor or dtor.
DMD has the obscure functionality to install functions starting with
_STI_ as global ctors and funtions starting with _STD_ as global
dtors. IMHO a pragma is a better way to specify the behaviour.

This commit adds pragma(LDC_global_crt_ctor) and
pragma(LDC_global_crt_dtor). If the pragma is specified on a function
or static method then an entry is made in the corresponding list. E.g.
in monitor_.d:

    extern (C) {
        #pragma(LDC_global_crt_ctor)
        void _STI_monitor_staticctor()
        {
            // ...
        }
    }

This works on Linux without problems. On Windows with MS C Runtime
ctors work always but dtors are invoked only if linked against the
static C runtime. Dtors on Windows require at least LLVM 3.2.
2012-12-22 21:18:37 +01:00

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//===-- gen/pragma.h - LDC-specific pragma handling -------------*- C++ -*-===//
//
// LDC the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
//
// Code for handling the LDC-specific pragmas.
//
//===----------------------------------------------------------------------===//
#ifndef PRAGMA_H
#define PRAGMA_H
#include <string>
struct PragmaDeclaration;
struct Dsymbol;
struct Scope;
enum Pragma
{
LLVMnone, // Not an LDC pragma.
LLVMignore, // Pragma has already been processed in DtoGetPragma, ignore.
LLVMintrinsic,
LLVMglobal_crt_ctor,
LLVMglobal_crt_dtor,
LLVMno_typeinfo,
LLVMno_moduleinfo,
LLVMalloca,
LLVMva_start,
LLVMva_copy,
LLVMva_end,
LLVMva_arg,
LLVMinline_asm,
LLVMinline_ir,
LLVMfence,
LLVMatomic_store,
LLVMatomic_load,
LLVMatomic_cmp_xchg,
LLVMatomic_rmw,
LLVMbitop_bt,
LLVMbitop_btc,
LLVMbitop_btr,
LLVMbitop_bts
};
Pragma DtoGetPragma(Scope *sc, PragmaDeclaration *decl, std::string &arg1str);
void DtoCheckPragma(PragmaDeclaration *decl, Dsymbol *sym,
Pragma llvm_internal, const std::string &arg1str);
#endif // PRAGMA_H