rework server-worker communication

OK, this is a major rework.

* tcp_server: connection threads are not detached anymore, the caller has
  to clean them up. This was done so that the server can clean up the
  threads cleanly.
* run_queue: simple refactoring, run_queue_entry is called just run now.
* server: worker threads are now killed when a run is assigned to a
  worker.
* worker: the connection to server is no longer persistent. A worker
  sends "new-worker", waits for a task, closes the connection, and when
  it's done, sends the "complete" message and waits for a new task.

This is supposed to improve resilience, since the worker-server
connections don't have to be maintained while the worker is doing a CI
run.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f8b2a7c..053ca9e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -48,7 +48,8 @@ add_my_executable(server server_main.c server.c
     sqlite.c
     storage.c
     storage_sqlite.c
-    tcp_server.c)
+    tcp_server.c
+    worker_queue.c)
 target_link_libraries(server PRIVATE pthread sqlite3)
 target_include_directories(server PRIVATE "${CMAKE_CURRENT_BINARY_DIR}")
 
@@ -67,5 +68,6 @@ add_my_executable(worker worker_main.c worker.c
     msg.c
     net.c
     process.c
+    run_queue.c
     signal.c)
 target_link_libraries(worker PRIVATE git2 pthread)