#include "simgrid/s4u/Host.hpp"
#include "simgrid/s4u/Storage.hpp"
#include "simgrid/simix.hpp"
-#include "src/surf/FileImpl.hpp"
#include "src/surf/HostImpl.hpp"
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_file,"S4U files");
namespace simgrid {
namespace s4u {
-File::File(const char* fullpath, void* userdata) : File(fullpath, Host::current(), userdata){};
+File::File(std::string fullpath, void* userdata) : File(fullpath, Host::current(), userdata){};
-File::File(const char* fullpath, sg_host_t host, void* userdata) : path_(fullpath), userdata_(userdata)
+File::File(std::string fullpath, sg_host_t host, void* userdata) : fullpath_(fullpath), userdata_(userdata)
{
// this cannot fail because we get a xbt_die if the mountpoint does not exist
Storage* st = nullptr;
size_t longest_prefix_length = 0;
- std::string path;
- XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, host->getCname());
+ XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath.c_str(), host->getCname());
- for (auto mnt : host->getMountedStorages()) {
+ for (auto const& mnt : host->getMountedStorages()) {
XBT_DEBUG("See '%s'", mnt.first.c_str());
- mount_point = std::string(fullpath).substr(0, mnt.first.size());
+ mount_point_ = fullpath.substr(0, mnt.first.length());
- if (mount_point == mnt.first && mnt.first.length() > longest_prefix_length) {
+ if (mount_point_ == mnt.first && mnt.first.length() > longest_prefix_length) {
/* The current mount name is found in the full path and is bigger than the previous*/
longest_prefix_length = mnt.first.length();
st = mnt.second;
}
}
if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
- mount_point = std::string(fullpath).substr(0, longest_prefix_length);
- path = std::string(fullpath).substr(longest_prefix_length, strlen(fullpath));
+ mount_point_ = fullpath.substr(0, longest_prefix_length);
+ path_ = fullpath.substr(longest_prefix_length, fullpath.length());
} else
- xbt_die("Can't find mount point for '%s' on '%s'", fullpath, host->getCname());
-
- pimpl_ =
- simgrid::simix::kernelImmediate([this, st, path] { return new simgrid::surf::FileImpl(st, path, mount_point); });
- storage_type = st->getType();
- storageId = st->getName();
-}
-
-File::~File()
-{
- simgrid::simix::kernelImmediate([this] { delete pimpl_; });
+ xbt_die("Can't find mount point for '%s' on '%s'", fullpath.c_str(), host->getCname());
+
+ localStorage = st;
+
+ XBT_DEBUG("\tOpen file '%s'", path_.c_str());
+ std::map<std::string, sg_size_t>* content = localStorage->getContent();
+ // if file does not exist create an empty file
+ auto sz = content->find(path_);
+ if (sz != content->end()) {
+ size_ = sz->second;
+ } else {
+ size_ = 0;
+ content->insert({path_, size_});
+ XBT_DEBUG("File '%s' was not found, file created.", path_.c_str());
+ }
}
sg_size_t File::read(sg_size_t size)
{
- return simcall_file_read(pimpl_, size, Host::current());
+ XBT_DEBUG("READ %s on disk '%s'", getPath(), localStorage->getCname());
+ // if the current position is close to the end of the file, we may not be able to read the requested size
+ sg_size_t read_size = localStorage->read(std::min(size, size_ - current_position_));
+ current_position_ += read_size;
+ return read_size;
}
sg_size_t File::write(sg_size_t size)
{
- return simcall_file_write(pimpl_,size, Host::current());
-}
+ XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu'", getPath(), localStorage->getCname(), size, size_);
+ // If the storage is full before even starting to write
+ if (localStorage->getSizeUsed() >= localStorage->getSize())
+ return 0;
+ /* Substract the part of the file that might disappear from the used sized on the storage element */
+ localStorage->decrUsedSize(size_ - current_position_);
-sg_size_t File::write(sg_size_t size, sg_host_t host)
-{
- return simcall_file_write(pimpl_, size, host);
+ sg_size_t write_size = localStorage->write(size);
+ current_position_ += write_size;
+ size_ = current_position_;
+
+ localStorage->getContent()->erase(path_);
+ localStorage->getContent()->insert({path_, size_});
+
+ return write_size;
}
sg_size_t File::size()
{
- return simgrid::simix::kernelImmediate([this] { return pimpl_->size(); });
+ return size_;
}
-void File::seek(sg_offset_t pos)
+void File::seek(sg_offset_t offset)
{
- simgrid::simix::kernelImmediate([this, pos] { pimpl_->seek(pos, SEEK_SET); });
+ current_position_ = offset;
}
-void File::seek(sg_offset_t pos, int origin)
+void File::seek(sg_offset_t offset, int origin)
{
- simgrid::simix::kernelImmediate([this, pos, origin] { pimpl_->seek(pos, origin); });
+ switch (origin) {
+ case SEEK_SET:
+ current_position_ = offset;
+ break;
+ case SEEK_CUR:
+ current_position_ += offset;
+ break;
+ case SEEK_END:
+ current_position_ = size_ + offset;
+ break;
+ default:
+ break;
+ }
}
sg_size_t File::tell()
{
- return simgrid::simix::kernelImmediate([this] { return pimpl_->tell(); });
+ return current_position_;
}
-void File::move(const char* fullpath)
+void File::move(std::string fullpath)
{
- simgrid::simix::kernelImmediate([this, fullpath] { pimpl_->move(fullpath); });
+ /* Check if the new full path is on the same mount point */
+ if (not strncmp(mount_point_.c_str(), fullpath.c_str(), mount_point_.length())) {
+ std::map<std::string, sg_size_t>* content = localStorage->getContent();
+ auto sz = content->find(path_);
+ if (sz != content->end()) { // src file exists
+ sg_size_t new_size = sz->second;
+ content->erase(path_);
+ std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
+ content->insert({path.c_str(), new_size});
+ XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
+ } else {
+ XBT_WARN("File %s doesn't exist", path_.c_str());
+ }
+ } else {
+ XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());
+ }
}
int File::unlink()
{
- return simgrid::simix::kernelImmediate([this] { return pimpl_->unlink(); });
+ /* Check if the file is on local storage */
+ if (localStorage->getContent()->find(path_) == localStorage->getContent()->end()) {
+ XBT_WARN("File %s is not on disk %s. Impossible to unlink", path_.c_str(), localStorage->getCname());
+ return -1;
+ } else {
+ XBT_DEBUG("UNLINK %s on disk '%s'", path_.c_str(), localStorage->getCname());
+ localStorage->decrUsedSize(size_);
+
+ // Remove the file from storage
+ localStorage->getContent()->erase(fullpath_);
+
+ return 0;
+ }
}
}} // namespace simgrid::s4u
