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Eliminate the "store" global variable

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Also, move a few free-standing functions into StoreAPI and Derivation.

Also, introduce a non-nullable smart pointer, ref<T>, which is just a
wrapper around std::shared_ptr ensuring that the pointer is never
null. (For reference-counted values, this is better than passing a
"T&", because the latter doesn't maintain the refcount. Usually, the
caller will have a shared_ptr keeping the value alive, but that's not
always the case, e.g., when passing a reference to a std::thread via
std::bind.)
This commit is contained in:
Eelco Dolstra 2016-02-04 14:28:26 +01:00
parent 4f7824c58e
commit c10c61449f
36 changed files with 511 additions and 458 deletions
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13
src/libstore/store-api.cc
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@ -284,12 +284,12 @@ string showPaths(const PathSet & paths)
}
void exportPaths(StoreAPI & store, const Paths & paths,
void StoreAPI::exportPaths(const Paths & paths,
bool sign, Sink & sink)
{
for (auto & i : paths) {
sink << 1;
store.exportPath(i, sign, sink);
exportPath(i, sign, sink);
}
sink << 0;
}
@ -306,10 +306,7 @@ void exportPaths(StoreAPI & store, const Paths & paths,
namespace nix {
std::shared_ptr<StoreAPI> store;
std::shared_ptr<StoreAPI> openStore(bool reserveSpace)
ref<StoreAPI> openStore(bool reserveSpace)
{
enum { mDaemon, mLocal, mAuto } mode;
@ -325,8 +322,8 @@ std::shared_ptr<StoreAPI> openStore(bool reserveSpace)
}
return mode == mDaemon
? (std::shared_ptr<StoreAPI>) std::make_shared<RemoteStore>()
: std::make_shared<LocalStore>(reserveSpace);
? make_ref<StoreAPI, RemoteStore>()
: make_ref<StoreAPI, LocalStore>(reserveSpace);
}