[PATCH v4 i-g-t 1/3] lib/igt_core: Expose igt_hook pointer for other libs

[Peter Senna Tschudin <peter.senna@linux.intel.com>]

Previously, all igt_hooks were defined, initialized, and freed within
lib/igt_core.c, limiting hook creation to this file. To enable other
libraries to add hooks, introduce a function that returns a pointer to
the main hook structure.

This change allows hooks to be created from external libraries without
requiring separate initialization or teardown of the hook
infrastructure.

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Cc: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Signed-off-by: Peter Senna Tschudin <peter.senna@linux.intel.com>
---
v4:
 - changed subject

v3:
 - unchanged

v2:
 - change function name to igt_core_get_igt_hook()
 - remove duplicated documentation from header 

 lib/igt_core.c | 12 ++++++++++++
 lib/igt_core.h |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/lib/igt_core.c b/lib/igt_core.c
index c2674a272..4bfffc3a8 100644
--- a/lib/igt_core.c
+++ b/lib/igt_core.c
@@ -3604,3 +3604,15 @@ unsigned int igt_measured_usleep(unsigned int usec)
 
 	return igt_nsec_elapsed(&ts) / NSEC_PER_USEC;
 }
+
+/**
+ * igt_core_get_igt_hook: To allow for using hooks from other libraries, this
+ * function returns the pointer to the struct that is likely already
+ * initialized.
+ *
+ * Returns: Pointer to the igt_hook structure.
+ */
+struct igt_hook *igt_core_get_igt_hook(void)
+{
+	return igt_hook;
+}
diff --git a/lib/igt_core.h b/lib/igt_core.h
index 2db579423..e658737b0 100644
--- a/lib/igt_core.h
+++ b/lib/igt_core.h
@@ -1601,4 +1601,6 @@ void igt_pci_system_cleanup(void);
 void igt_emit_ignore_dmesg_regex(const char *ignore_dmesg_regex);
 
 unsigned int igt_measured_usleep(unsigned int usec);
+
+struct igt_hook *igt_core_get_igt_hook(void);
 #endif /* IGT_CORE_H */
-- 
2.43.0