2 files changed, 12 insertions, 8 deletions

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 5445d39c560..a872942d2a8 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1888,6 +1888,7 @@ enum gl_frag_depth_layout
  */
 struct gl_program
 {
+   mtx_t Mutex;
    GLuint Id;
    GLint RefCount;
    GLubyte *String;  /**< Null-terminated program text */
diff --git a/src/mesa/program/program.c b/src/mesa/program/program.c
index 18d6754a99a..e94c1021258 100644
--- a/src/mesa/program/program.c
+++ b/src/mesa/program/program.c
@@ -226,6 +226,7 @@ init_program_struct(struct gl_program *prog, GLenum target, GLuint id)
    assert(prog);
 
    memset(prog, 0, sizeof(*prog));
+   mtx_init(&prog->Mutex, mtx_plain);
    prog->Id = id;
    prog->Target = target;
    prog->RefCount = 1;
@@ -418,6 +419,7 @@ _mesa_delete_program(struct gl_context *ctx, struct gl_program *prog)
       ralloc_free(prog->nir);
    }
 
+   mtx_destroy(&prog->Mutex);
    free(prog);
 }
 
@@ -463,17 +465,18 @@ _mesa_reference_program_(struct gl_context *ctx,
 
    if (*ptr) {
       GLboolean deleteFlag;
+      struct gl_program *oldProg = *ptr;
 
-      /*mtx_lock(&(*ptr)->Mutex);*/
-      assert((*ptr)->RefCount > 0);
-      (*ptr)->RefCount--;
+      mtx_lock(&oldProg->Mutex);
+      assert(oldProg->RefCount > 0);
+      oldProg->RefCount--;
 
-      deleteFlag = ((*ptr)->RefCount == 0);
-      /*mtx_lock(&(*ptr)->Mutex);*/
+      deleteFlag = (oldProg->RefCount == 0);
+      mtx_unlock(&oldProg->Mutex);
 
       if (deleteFlag) {
          assert(ctx);
-         ctx->Driver.DeleteProgram(ctx, *ptr);
+         ctx->Driver.DeleteProgram(ctx, oldProg);
       }
 
       *ptr = NULL;
@@ -481,9 +484,9 @@ _mesa_reference_program_(struct gl_context *ctx,
 
    assert(!*ptr);
    if (prog) {
-      /*mtx_lock(&prog->Mutex);*/
+      mtx_lock(&prog->Mutex);
       prog->RefCount++;
-      /*mtx_unlock(&prog->Mutex);*/
+      mtx_unlock(&prog->Mutex);
    }
 
    *ptr = prog;