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// main.c
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
// -----------------------------------------------------------------------------
#ifdef __APPLE__
#include <mach/mach_time.h>
#include <dlfcn.h>
#endif
#if defined(__linux__)
#include <dlfcn.h>
#endif
#if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#include <Windows.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#define REPL_MAIN $s10repl_swift0A5_mainSiyF
#if !defined(__has_attribute)
#define __has_attribute(attribute) 0
#endif
#if __has_attribute(__optnone__)
#define SWIFT_REPL_NOOPT __attribute__((__optnone__))
#else
#define SWIFT_REPL_NOOPT
#endif
SWIFT_REPL_NOOPT
int
#if defined(_WIN32)
__declspec(dllexport)
#endif
REPL_MAIN() {
return 0;
}
SWIFT_REPL_NOOPT
#if defined(_WIN32)
int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {
#else
int main() {
#endif
#ifdef __APPLE__
// Force loading of libswiftCore.dylib, which is not linked at build time.
// We load the system's libswiftCore, but this is overriden on tests to
// use the just built one by setting DYLD_LIBRARY_PATH.
dlopen("/usr/lib/swift/libswiftCore.dylib", RTLD_LAZY);
#elif defined(__linux__)
dlopen("libswiftCore.so", RTLD_LAZY);
#elif defined(_WIN32)
HMODULE hModule = LoadLibraryW(L"swiftCore.dll");
if (hModule == NULL)
return EXIT_FAILURE;
#endif
#ifdef __APPLE__
// This code will be run when running the REPL. A breakpoint will be set at
// "repl_main" and we will hit that breakpoint and then allow REPL statements
// to be evaluated. Since LLDB allows process control, the user can accidentally
// continue the target:
//
// 1> :c
//
// So to safeguard against this we hit the breakpoint over and over. If the user
// detaches:
//
// 1> :process detach
//
// we want this program to exit without consuming 100% CPU, so we detect any loops
// that take less than 100us and if we get three of them in a row, we exit.
struct mach_timebase_info TimebaseInfo;
mach_timebase_info(&TimebaseInfo);
int SubsequentShort = 0;
while (SubsequentShort < 3) {
const uint64_t Start = mach_absolute_time();
REPL_MAIN();
const uint64_t End = mach_absolute_time();
const uint64_t ElapsedTicks = End - Start;
const uint64_t ElapsedNano = (ElapsedTicks * (uint64_t)(TimebaseInfo.numer)) / (uint64_t)(TimebaseInfo.denom);
if (ElapsedNano < 100000) {
SubsequentShort += 1;
} else {
SubsequentShort = 0;
}
}
#else
return REPL_MAIN();
#endif
}
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