Use CLOCK_MONOTONIC for mutex waiting on iOS/macOS

[akoeplinger]

See #58737 and related PRs.

CLOCK_MONOTONIC is available on ios 10+, but not pthread_condattr_setclock. We disable the code on Apple platforms using BROKEN_CLOCK_SOURCE in

runtime/src/mono/mono/utils/mono-os-mutex.h

Lines 39 to 41 in 4211dc4

	#if !defined(CLOCK_MONOTONIC) || defined(HOST_DARWIN) || defined(HOST_WASM)
	#define BROKEN_CLOCK_SOURCE
	#endif

We should look into using pthread_cond_timedwait with a CLOCK_MONOTONIC argument or alternatively enable clock_gettime (supported by newer macOS/iOS releases) on Apple platforms.

[SamMonoRT]

Nice to have, but not blocking release. Moving to 9.0.0

[ghost]

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Issue Details

---

See #58737 and related PRs.

CLOCK_MONOTONIC is available on ios 10+, but not pthread_condattr_setclock. We disable the code on Apple platforms using BROKEN_CLOCK_SOURCE in

runtime/src/mono/mono/utils/mono-os-mutex.h

Lines 39 to 41 in 4211dc4

	#if !defined(CLOCK_MONOTONIC) || defined(HOST_DARWIN) || defined(HOST_WASM)
	#define BROKEN_CLOCK_SOURCE
	#endif

We should look into using pthread_cond_timedwait with a CLOCK_MONOTONIC argument or alternatively enable clock_gettime (supported by newer macOS/iOS releases) on Apple platforms.

Author:	akoeplinger
Assignees:	ivanpovazan, matouskozak
Labels:	os-mac-os-x, area-VM-meta-mono, os-ios
Milestone:	9.0.0

[ivanpovazan]

Nice to have, but not blocking release. Moving to 10.0.0