#pragma once

#include <functional>
#include <string>

#include "types.hh"

class sqlite3;
class sqlite3_stmt;

namespace nix {

/* RAII wrapper to close a SQLite database automatically. */
struct SQLite
{
    sqlite3 * db;
    SQLite() { db = 0; }
    ~SQLite();
    operator sqlite3 * () { return db; }
};

/* RAII wrapper to create and destroy SQLite prepared statements. */
struct SQLiteStmt
{
    sqlite3 * db = 0;
    sqlite3_stmt * stmt = 0;
    SQLiteStmt() { }
    void create(sqlite3 * db, const std::string & s);
    ~SQLiteStmt();
    operator sqlite3_stmt * () { return stmt; }

    /* Helper for binding / executing statements. */
    class Use
    {
        friend struct SQLiteStmt;
    private:
        SQLiteStmt & stmt;
        unsigned int curArg = 1;
        Use(SQLiteStmt & stmt);

    public:

        ~Use();

        /* Bind the next parameter. */
        Use & operator () (const std::string & value, bool notNull = true);
        Use & operator () (int64_t value, bool notNull = true);
        Use & bind(); // null

        int step();

        /* Execute a statement that does not return rows. */
        void exec();

        /* For statements that return 0 or more rows. Returns true iff
           a row is available. */
        bool next();

        std::string getStr(int col);
        int64_t getInt(int col);
    };

    Use use()
    {
        return Use(*this);
    }
};

/* RAII helper that ensures transactions are aborted unless explicitly
   committed. */
struct SQLiteTxn
{
    bool active = false;
    sqlite3 * db;

    SQLiteTxn(sqlite3 * db);

    void commit();

    ~SQLiteTxn();
};


MakeError(SQLiteError, Error);
MakeError(SQLiteBusy, SQLiteError);

[[noreturn]] void throwSQLiteError(sqlite3 * db, const format & f);

/* Convenience function for retrying a SQLite transaction when the
   database is busy. */
template<typename T>
T retrySQLite(std::function<T()> fun)
{
    while (true) {
        try {
            return fun();
        } catch (SQLiteBusy & e) {
        }
    }
}

}
>path: <a href='/guix/log/?id=85743578bc5796116f5c597b7be4caebacf38c52'>root</a>/<a href='/guix/log/build-aux?id=85743578bc5796116f5c597b7be4caebacf38c52'>build-aux</a>/<a href='/guix/log/build-aux/cuirass?id=85743578bc5796116f5c597b7be4caebacf38c52'>cuirass</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/build-aux/cuirass?id=85743578bc5796116f5c597b7be4caebacf38c52&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-08-21 10:45:45 +0200'>2023-08-21</span></td><td><a href='/guix/commit/build-aux/cuirass?id=3c6b6941a2c76c26ebf0c1bfd7f901a22c19dce1'>maint: Add 'etc/hurd-manifest.scm'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/cuirass/hurd-manifest.scm: Move to...
* etc/hurd-manifest.scm: ...here.
* Makefile.am (EXTRA_DIST): Update accordingly.
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-07-25 15:48:42 +0200'>2023-07-25</span></td><td><a href='/guix/commit/build-aux/cuirass?id=9dfda9e1a0d2798d4caf23fa00bf272ca1afcc7e'>cuirass: Update hurd-manifest with newly supported packages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/cuirass/hurd-manifest.scm: Include full build of python-minimal
and gettext-minimal (no longer without-tests).  Add grub-minimal, grub,
guix-without-tests and guile-3.0 (no longer delete it from guix dependencies).
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2022-05-26 11:41:05 +0200'>2022-05-26</span></td><td><a href='/guix/commit/build-aux/cuirass?id=d90bd5642a3663cc7d5124068fadbf8fa28b3207'>cuirass: Create just as many threads as needed.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/cuirass/evaluate.scm (command-line): Change second argument
to 'n-par-for-each'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-05-26 11:41:05 +0200'>2022-05-26</span></td><td><a href='/guix/commit/build-aux/cuirass?id=98a6642298be6663b9d318b7dea46d1dba275839'>cuirass: Fork inferior processes before creating threads.</a><span class='msg-avail'>...<span class='msg-tooltip'>Works around &lt;https://issues.guix.gnu.org/55441#12&gt;.

Start from commit bd86bbd300474204878e927f6cd3f0defa1662a5,
'open-inferior' uses 'primitive-fork' instead of 'open-pipe*'.  As a
result, child process could potentially hang before calling 'execl' due
to undefined behavior when forking a multi-threaded process.

* build-aux/cuirass/evaluate.scm &lt;top level&gt;: Call 'open-inferior'
before 'n-par-for-each'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-05-20 18:46:07 +0200'>2022-05-20</span></td><td><a href='/guix/commit/build-aux/cuirass?id=598f7289db9955584457ffc11c8504f3938a1618'>cuirass: Close each inferior upon completion.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/cuirass/evaluate.scm &lt;top level&gt;: Add 'close-inferior' call.
</span></span></td><td>Ludovic Courtès</td></tr>