From bb944f2958339e09a936c98f931c38e3fa3f8c5f Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 11 Jan 2019 12:50:30 +0100
Subject: Initial commit.

---
 threadpool.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 threadpool.c

(limited to 'threadpool.c')

diff --git a/threadpool.c b/threadpool.c
new file mode 100644
index 0000000..57d046b
--- /dev/null
+++ b/threadpool.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2018 Anton Khirnov <anton@khirnov.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <omp.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "threadpool.h"
+
+struct TPContext {
+    char dummy;
+};
+
+void tp_free(TPContext **pctx)
+{
+    TPContext *ctx = *pctx;
+
+    if (!ctx)
+        return;
+
+    free(ctx);
+    *pctx = NULL;
+}
+
+int tp_init(TPContext **pctx, unsigned int nb_threads)
+{
+    TPContext *ctx = NULL;
+    int ret;
+
+    if (!nb_threads) {
+        ret = -EINVAL;
+        goto fail;
+    }
+
+    ctx = calloc(1, sizeof(*ctx));
+    if (!ctx) {
+        ret = -ENOMEM;
+        goto fail;
+    }
+
+    omp_set_num_threads(nb_threads);
+
+    *pctx = ctx;
+    return 0;
+
+fail:
+    tp_free(&ctx);
+    *pctx = NULL;
+    return ret;
+}
+
+int tp_execute(TPContext *ctx, unsigned int nb_jobs,
+               TPExecuteCallback func, void *func_arg)
+{
+#pragma omp parallel for
+    for (unsigned int i = 0; i < nb_jobs; i++)
+        func(func_arg, i, omp_get_thread_num());
+
+    return 0;
+}
+
+unsigned int tp_get_nb_threads(TPContext *ctx)
+{
+    return omp_get_num_threads();
+}
-- 
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