til_module_context: hash the path

The purpose of the context path is to aid in locating the context
instance.  The initial application of this will be in service of
the taps, which require their module's path as a sort of
containing directory of the tap name.  It'd be convenient to
simply add the path hash with the tap hash to produce the tap's
"absolute path" hash when looking up in the hash table.

2 files changed, 6 insertions, 0 deletions

diff --git a/src/til_module_context.c b/src/til_module_context.c
index 5dffa73..9767d96 100644
--- a/src/til_module_context.c
+++ b/src/til_module_context.c
@@ -1,8 +1,10 @@
 #include <assert.h>
 #include <errno.h>
+#include <stdint.h>
 #include <stdlib.h>
 
 #include "til.h"
+#include "til_jenkins.h"
 #include "til_module_context.h"
 
 
@@ -41,6 +43,7 @@ void * til_module_context_new(size_t size, unsigned seed, unsigned ticks, unsign
 	module_context->ticks = ticks;
 	module_context->n_cpus = n_cpus;
 	module_context->path = path;
+	module_context->path_hash = til_jenkins((uint8_t *)path, strlen(path));
 
 	return module_context;
 }
diff --git a/src/til_module_context.h b/src/til_module_context.h
index d017a99..b2caf28 100644
--- a/src/til_module_context.h
+++ b/src/til_module_context.h
@@ -1,6 +1,8 @@
 #ifndef _TIL_MODULE_CONTEXT_H
 #define _TIL_MODULE_CONTEXT_H
 
+#include <stdint.h>
+
 typedef struct til_module_context_t til_module_context_t;
 typedef struct til_module_t til_module_t;
 
@@ -10,6 +12,7 @@ struct til_module_context_t {
 	unsigned		ticks;
 	unsigned		n_cpus;
 	char			*path;	/* for locating this instance of the module, NOT a file path */
+	uint32_t		path_hash;
 };
 
 void * til_module_context_new(size_t size, unsigned seed, unsigned ticks, unsigned n_cpus, char *path);