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#include "ModuleCache.h"
#include "module.h"
#include "printutils.h"
#include "openscad.h"
#include "boosty.h"
#include <boost/format.hpp>
#include <boost/filesystem.hpp>
#include <boost/foreach.hpp>
#include <stdio.h>
#include <fstream>
#include <sstream>
#include <time.h>
#include <sys/stat.h>
//#include "parsersettings.h"
/*!
FIXME: Implement an LRU scheme to avoid having an ever-growing module cache
*/
ModuleCache *ModuleCache::inst = NULL;
/*!
Reevaluate the given file and recompile if necessary.
Returns NULL on any error (e.g. compile error or file not found)
The given filename must be absolute.
*/
FileModule *ModuleCache::evaluate(const std::string &filename)
{
FileModule *lib_mod = NULL;
bool found = false;
if (this->entries.find(filename) != this->entries.end()) {
found = true;
lib_mod = this->entries[filename].module;
}
// Don't try to recursively evaluate - if the file changes
// during evaluation, that would be really bad.
if (lib_mod && lib_mod->isHandlingDependencies()) return lib_mod;
// Create cache ID
struct stat st;
memset(&st, 0, sizeof(struct stat));
bool valid = (stat(filename.c_str(), &st) == 0);
// If file isn't there, just return and let the cache retain the old module
if (!valid) return NULL;
// If the file is present, we'll always cache some result
std::string cache_id = str(boost::format("%x.%x") % st.st_mtime % st.st_size);
cache_entry &entry = this->entries[filename];
// Initialize entry, if new
if (!found) {
entry.module = NULL;
entry.cache_id = cache_id;
}
bool shouldCompile = true;
if (found) {
// Files should only be recompiled if the cache ID changed
if (entry.cache_id == cache_id) {
shouldCompile = false;
// Recompile if includes changed
if (lib_mod && lib_mod->includesChanged()) {
lib_mod = NULL;
shouldCompile = true;
}
}
}
#ifdef DEBUG
// Causes too much debug output
//if (!shouldCompile) PRINTB("Using cached library: %s (%p)", filename % lib_mod);
#endif
// If cache lookup failed (non-existing or old timestamp), compile module
if (shouldCompile) {
#ifdef DEBUG
if (found) {
PRINTB("Recompiling cached library: %s (%s)", filename % cache_id);
}
else {
PRINTB("Compiling library '%s'.", filename);
}
#endif
std::stringstream textbuf;
{
std::ifstream ifs(filename.c_str());
if (!ifs.is_open()) {
PRINTB("WARNING: Can't open library file '%s'\n", filename);
return NULL;
}
textbuf << ifs.rdbuf();
}
textbuf << "\n" << commandline_commands;
print_messages_push();
FileModule *oldmodule = lib_mod;
std::string pathname = boosty::stringy(fs::path(filename).parent_path());
lib_mod = dynamic_cast<FileModule*>(parse(textbuf.str().c_str(), pathname.c_str(), false));
PRINTB_NOCACHE(" compiled module: %p", lib_mod);
// We defer deletion so we can ensure that the new module won't
// have the same address as the old
if (oldmodule) delete oldmodule;
entry.module = lib_mod;
entry.cache_id = cache_id;
print_messages_pop();
}
if (lib_mod) lib_mod->handleDependencies();
return lib_mod;
}
void ModuleCache::clear()
{
this->entries.clear();
}
FileModule *ModuleCache::lookup(const std::string &filename)
{
return isCached(filename) ? this->entries[filename].module : NULL;
}
bool ModuleCache::isCached(const std::string &filename)
{
return this->entries.find(filename) != this->entries.end();
}
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