79 lines
1.8 KiB
Text
79 lines
1.8 KiB
Text
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backport of https://github.com/apple/swift-corelibs-libdispatch/pull/559
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Index: tests/dispatch_workqueue.c
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--- tests/dispatch_workqueue.c.orig
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+++ tests/dispatch_workqueue.c
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@@ -0,0 +1,72 @@
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+#include <bsdtests.h>
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+#include "dispatch_test.h"
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+
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+struct test_context {
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+ uint32_t ncpu;
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+ int flag;
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+};
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+
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+static void
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+timeout(void *context)
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+{
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+ struct test_context *ctx = (struct test_context *)context;
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+ sleep(2); // Give the monitor the best chance of firing.
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+ test_int32_format(ctx->flag, 1, "flag");
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+ test_stop();
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+}
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+
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+static void
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+raise_flag(void *context)
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+{
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+ struct test_context *ctx = (struct test_context *)context;
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+ ctx->flag++;
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+}
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+
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+static void
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+spin(void *context)
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+{
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+ struct test_context *ctx = (struct test_context *)context;
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+ sleep(ctx->ncpu * 2);
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+}
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+
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+static uint32_t
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+activecpu(void)
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+{
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+ uint32_t activecpu;
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+#if defined(__linux__) || defined(__OpenBSD__)
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+ activecpu = (uint32_t)sysconf(_SC_NPROCESSORS_ONLN);
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+#elif defined(_WIN32)
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+ SYSTEM_INFO si;
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+ GetSystemInfo(&si);
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+ activecpu = si.dwNumberOfProcessors;
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+#else
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+ size_t s = sizeof(activecpu);
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+ sysctlbyname("hw.activecpu", &activecpu, &s, NULL, 0);
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+#endif
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+ return activecpu;
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+}
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+
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+int
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+main(void)
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+{
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+ uint32_t ncpu = activecpu();
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+
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+ dispatch_test_start("Dispatch workqueue");
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+
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+ dispatch_queue_t global = dispatch_get_global_queue(0, 0);
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+ test_ptr_notnull("dispatch_get_global_queue", global);
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+
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+ struct test_context ctx = {ncpu, 0};
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+ dispatch_async_f(global, &ctx, timeout);
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+
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+ for(int i = 0; i < (int)ncpu - 1; i++) {
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+ dispatch_async_f(global, &ctx, spin);
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+ }
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+
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+ // All cpus are tied up at this point. Workqueue
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+ // should execute this function by overcommit.
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+ dispatch_async_f(global, &ctx, raise_flag);
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+
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+ dispatch_main();
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+ return 0;
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+}
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